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23 (number) - Wikipedia, the free encyclopedia |
 | | The fifth Sophie Germain prime and the fourth safe prime, 23 is the next to last member of the first Cunningham chain of the first kind to have five terms (2, 5, 11, 23, 47). |
 | | 23 also has the distinction of being one of two integers that cannot be expressed as the sum of fewer than 9 cubes of integers (the other is 239). |
 | | Each parent passes on 23 chromosomes; Earth's axis is at a 23° angle. |
| en.wikipedia.org /wiki/23_(number) (1146 words) |
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