Friday, February 22, 2013

697

697 = 17 x 41.

697 is a heptagonal number.

697 is a cake number.

697 is a 12-hyperperfect number.

697 has two representations as a sum of two squares: 697 = 112 + 242 = 162 + 212.

697 is the hypotenuse of two primitive Pythagorean triples: 6972 = 1852 + 6722 = 4552 + 5282.


Source: What's Special About This Number? 

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