Objection! This amounts to "2 is the only prime not divisible by 2"! How about 2 is the highest solution for N in any equation X^N + Y^N = Z^N?
3 is the number of spatial dimensions we live in?
Objection! This is a mere contingent empirical fact! This is a fact about our universe, not the number 3! You might as well say that your car has three seats in the back. How about "3 is the first number whose factorial does not equal itself"?
I do get your point that it's not a mathematical property of the number. (But I think you can find some geometrical something that only works in 3 dimensions.)
Thank you! I was wondering about that just last night over beer. Now I can sleep easy :-)
Seriously the only thing missing:
1 is the number of web site authors with way too much time on their hands.
Anyone that can explain this?
Which also says "There are also very few squares with no unpaired digits", so the 'only number' bit seems erroneous (it did sound hard to believe).
Indeed.