Tuesday, May 5, 2009

634

634 = 2 x 317.

634 is a Smith number. The sum of its digits equals the sum of the digits appearing in its prime divisors: 6 + 3 + 4 = 2 + 3 + 1 + 7 = 13.

The fifth root of 634 has a decimal part that begins with the digits 634.


Source: Number Gossip

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