Tuesday, December 10, 2013

897

897 = 3 x 13 x 23. It is the only sphenic number with prime factors of the form p(p + 10)(p + 20).

897 is divisible by the sum of its prime factors (A046346).

897 is a Cullen number; it has the form n x 2n + 1, for n = 7 (A002064).

897 is the sum of the first 34 nonprimes (A051349).

The sum of the digits of 897 is equal to 8 times the number of digits (A061425).

897 is the sum of three nonzero fourth powers (A003337).

897 divides 474 - 1.


Source: Prime Curios!

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