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.
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.
634 has a representation as a sum of two squares: 634 = 32 + 252.
Source: Number Gossip
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