Today is September, 9, 2009 or 9/9/09

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September 9, 2009, or 9/9/09, sparked a lively discussion centered around the significance and interesting properties of the number nine. Participants shared various mathematical facts, such as nine being the largest single-digit number, the smallest odd non-prime, and the only odd square integer besides one. The conversation also highlighted playful trivia, including the number nine's representation in different contexts, such as being upside down as 6, its connection to the number of planets (counting Pluto), and its appearances in popular culture, like the Beatles' White Album. The date itself was noted as a unique occurrence, with comparisons to future similar dates like 10/10/10. Some participants humorously reflected on personal experiences related to the date, while others shared celebratory anecdotes, including a mock celebration at 9:09:09. Overall, the thread emphasized the quirky fascination with the number nine and its mathematical and cultural relevance.
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Today is September, 9, 2009 or 9/9/09 which, if it weren't for that irritating little zero, would be 9/9/9, and thereby would have been an important coincidence and trivia fact of some note. Nothing like this has happened since August 8, last year. Here are some amazing facts about the number nine to fool your friends with.

9 is the largest single digit number in the decimal system.
9 is the smallest odd number that isn't a prime, except for 1 and all the negative odd numbers.
9 is the smallest odd square integer, except for 1.
9 is 6 upside down, which means that 9/9/09 upside down is 60/6/6, somewhat like the number of the beast.
9 is the number of planets if you count Pluto.
9 times 9 is 81, and 8 plus 1 is 9.
9 is the number of the best cloud.
9 is the official integer of the Beatles White album.
9 is the number of fun facts if you count this one.

Life would be dull indeed without this seemingly mundane, yet odd, integer.
 
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Yes, nine has a lot of interesting properties, like:

1+8=9
2+7=9
3+6=9
4+5=9
5+4=9
6+3=9
7+2=9
8+1=9

Fascinating indeed - whichever way you try, it gives 9.

999=33*37 - to make three nines, we need three threes and a seven thrown in, which as we know is a lucky number.
 


.The third square and therefore the sum of two consecutive triangular numbers 9=3+6
.Written as 100 in base 3
.The only square that is the sum of two consecutive cubes 9=1 cubed +2 cubed
.The 4th lucky number,and the first square lucky number apart from 1
.9=1!+2!+3!
.The smallest Kaprekar number apart from1.9 squared=81 and 8+1=9
.There are nine regular polyhedra,the 5 Platonic solids and the 4 Kepler Poinsot stellated polyhedra.
.9 is the smallest numberof distinct integral squares into which a rectangle may be divided.The smallest solution is 32 by 33 and the squares have sides 1,4,7,8,9,10,14,15and 18.
.No in German is pronounced nine(Sorry I wanted to make 9 points)
 


jimmysnyder said:
Today is September, 9, 2009 or 9/9/09 which, if it weren't for that irritating little zero, would be 9/9/9, and thereby would have been an important coincidence and trivia fact of some note. Nothing like this has happened since August 8, last year. Here are some amazing facts about the number nine to fool your friends with.

9 is the largest single digit number in the decimal system.
9 is the smallest odd number that isn't a prime, except for 1 and all the negative odd numbers.
9 is the smallest odd square integer, except for 1.
9 is 6 upside down, which means that 9/9/09 upside down is 60/6/6, somewhat like the number of the beast.
9 is the number of planets if you count Pluto.
9 times 9 is 81, and 8 plus 1 is 9.
9 is the number of the best cloud.
9 is the official integer of the Beatles White album.
9 is the number of fun facts if you count this one.

Life would be dull indeed without this seemingly mundane, yet odd, integer.

Actually, it could be written in this manner - 09/09/09.
 


WhoWee said:
Actually, it could be written in this manner - 09/09/09.
But then we would be at a complete loss to know which 09 was for the year, month, and date. At least with 9/9/09, some of that confusion is reduced.
 


jimmysnyder said:
But then we would be at a complete loss to know which 09 was for the year, month, and date. At least with 9/9/09, some of that confusion is reduced.

I attempted to post at 09:09:09 on 09/09/09, but my computer wasn't fast enough.
 


WhoWee said:
I attempted to post at 09:09:09 on 09/09/09, but my computer wasn't fast enough.
good one!
 


jimmysnyder said:
9 is the number of fun facts if you count this one.
9 is the number of fingers on an inattentive wood shop worker.
 


mgb_phys said:
9 is the number of fingers on an inattentive wood shop worker.

After the first day, the story doesn't end here.
 
  • #10


mgb_phys said:
9 is the number of fingers on an inattentive wood shop worker.

:smile:

there're still other similar dates such as 10/10/10, 11/11/11, 12/12/12, that's it..
 
  • #11


drizzle said:
:smile:

there're still other similar dates such as 10/10/10, 11/11/11, 12/12/12, that's it..

I was born at 10:10 on 10/10/1959 - the 10th year of the decade.


Somehow my lucky number is 812?
 
  • #12


But,

1 is the lonliest number. :cool:
 
  • #13


As a kid, I was fascinated by the number four, and geometric representations of groups of 4 in 2 and 3 dimensions. Unfortunately, I missed the chance to celebrate on 04/04/04, so I'll just have to wait for it to come around again. :wink:
 
  • #14


Astronuc said:
But,

1 is the lonliest number. :cool:

And yet so many people want to be #1.:confused:
 
  • #15


AFAIR I have managed to remember to celebrate my 10,000th day :smile: but I forgot the 15,000th :cry:

Next nice occasion will be in 2017.
 
  • #16


Darn! 20,000 slipped by me. Well, at least I can shoot for 21,000 in a little over 5 weeks.
 
  • #17


Borek said:
Yes, nine has a lot of interesting properties, like:

1+8=9
2+7=9
3+6=9
4+5=9
5+4=9
6+3=9
7+2=9
8+1=9

Fascinating indeed - whichever way you try, it gives 9.

999=33*37 - to make three nines, we need three threes and a seven thrown in, which as we know is a lucky number.

Wow, that's just amazing. That can't be a coincidence!
Don't forget this remarkable fact: nine is 10 in base 9, but 9 modulo 10... !
 
  • #18


You're a little late on this 9/9/9 thing; it happened two thousand years ago. There's nothing significant about 9/9/2009.
No problem though, just wait exactly 7990 years and catch that one.
 
  • #19


leroyjenkens said:
just wait exactly 7990 years and catch that one.
Why? What's going to happen in 7990 years that didn't happen this year?
 
  • #21


jimmysnyder said:
why? What's going to happen in 7990 years that didn't happen this year?

9/9/9999 ?
 
  • #22


today 9/9/9 is my mom's 82 birthday, to bad it is't the 81st, that would be a real 9 fest
 
  • #23


9 holding the lofty position as the largest base 10 integer has properties just like the largest integer in any base.
 
  • #24


PF member-recommended Nine movies:

The Nines
The Ninth Configuration
The Ninth Gate
 
  • #25


We had our 999999 celebration at 9:09:09 this morning. We did make a compromise and celebrated at 9:09 local time instead of 9:09 Zulu.
 
  • #26


BobG said:
We had our 999999 celebration at 9:09:09 this morning.

It was a very quick celebration.
 
  • #27


Ivan Seeking said:
PF member-recommended Nine movies:

The Nines
The Ninth Configuration
The Ninth Gate

Or the animated movie that's released in theaters today called "9".
 
  • #28


Don't forget "Plan Nine from Outer Space."
 
  • #29


District 9... come on guys.
 
  • #30


No one else put this up yet?
1378672867_c047664900.jpg
 
  • #31


not sure if you know this


9×1=09
9×2=18
9×3=27
9×4=36
9×5=45
9×6=54
9×7=63
9×8=72
9×9=81
9×10=90
 
  • #32


[/color]9^2=81, 8+1=9[/color]

9^3=729, 7+2+9=18[/color]

9^4=6561, 6+5+6+1=18[/color]

9^5=59049, 27[/color]

9^6=531441, 18[/color]

9^7=4782969, 45[/color]

9^8=43046721, 27[/color]

9^9=387420489, 45[/color]

9+18+18+27+18+45+27+45=207, 207/9=23[/color]
 
Last edited:
  • #33


Chi Meson said:
No one else put this up yet?
1378672867_c047664900.jpg


Okay, that one makes me just want to give up!

41K8Dd7BRZL._SL500_AA280_.jpg
 
  • #34
http://en.wikipedia.org/wiki/9_(number)" .
 
Last edited by a moderator:
  • #35


BobG said:
We had our 999999 celebration at 9:09:09 this morning. We did make a compromise and celebrated at 9:09 local time instead of 9:09 Zulu.

Ivan Seeking said:
It was a very quick celebration.

Yes, it was. We spent more time eating nine-ingredient Chex mix, eating nine of each type of pastry, etc than we did celebrating with "Woohoo!".

On the other hand, we did get an early start planning our 10/10/10 10:10:10 celebration, a topic that got the computer geeks all excited about something called binary day.
 
  • #36


I was out on the trails this morning and I saw birds, butterflies, one frog in the pond, a deer, trees... but no nines.
 
  • #37


runner said:
I was out on the trails this morning and I saw birds, butterflies, one frog in the pond, a deer, trees... but no nines.

Are you sure the trail you were on was one of sincerity? The nines only appear on the most sincere trails. And are you sure you didn't accidentally show a lack of faith? The smallest slip of the tongue ("if" the nines appear vs "when" the nines appear) can doom you.

And are you sure today is the 9th? It can be very embarrassing to realize you've missed it completely, but it does occasionally happen. Don't feel bad. There's always ... uh ... well maybe you should feel bad.
 
  • #38


BobG said:
Okay, that one makes me just want to give up!

41K8Dd7BRZL._SL500_AA280_.jpg
Shouldn't that be "WhenEver!"?


It's a good thing that we don't have 11 toes. Well - at least most of us don't.
 
  • #39


Astronuc said:
Shouldn't that be "WhenEver!"?

Does it matter? Aren't time and space the same?
 
  • #40


Astronuc said:
Shouldn't that be "WhenEver!"?

Whatever!
 
  • #41


p-16
h-8
y-25
s-19
i-9
c-3
s-19

16+8+25+19+9+3+19=99
 
  • #42


J-10
r-18
e-5
e-5
l-12
a-1
w-23
g-7

10+18+5+5+12+1+23+7=81
 
  • #43


CompuChip said:
Does it matter? Aren't time and space the same?
Hmmm - then it must be WhenWherever or Whencewhen?
 

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