What's special about this number

[koolbluez]

"What's special about this number?" is a math-geek cool site explaining the significance of thousands of numbers between 0 and 9999.
Sample from the site...

0 is the additive identity.
1 is the multiplicative identity.
2 is the only even prime.
3 is the number of spatial dimensions we live in.
4 is the smallest number of colors sufficient to color all planar maps.
5 is the number of Platonic solids.
6 is the smallest perfect number.
7 is the smallest number of faces of a regular polygon that is not constructible by straightedge and compass.
8 is the largest cube in the Fibonacci sequence.
9 is the maximum number of cubes that are needed to sum to any positive integer.
10 is the base of our number system.
4920 = 6666 in base 9.
9768 = 2 * 22 * 222.
9801 is 9 times its reverse.
9999 is a Kaprekar number...
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[casanova]

Thats a great collection. I add something else 13 square = 169 and 31 square = 961

 

[trigger]

ultimate buddy....

 

[yashved]

Nice site that one!

 

[piyush gupta]

Very nice site buddyy

 

[Tech Geek]

Nice finding
thanks

 

[deepak.krishnan]

superb one!!!

 

[Tech.Masti]

gooood work buddy.....keep it up.....

 

[joey_182]

hmmm....nice link

 

[pra_2006]

very good site for some information

 

[koolbluez]

And... nice addition, Casanova...
And tnx tech_geek 4 uknowwhat...

 

[hemant_mathur]

Great site.

 

[alok4best]

nice page ,I must say.