Friday, November 20, 2009

799

799 = 17 x 47.

799 is the smallest number with a composite sum of digits (7 + 9 + 9 = 25) and a prime sum of cubes of digits (73 + 93 + 93 = 1801).

799 is the smallest number whose sum of digits is 25.

799 is a number that cannot be written as a sum of three squares.

799 is the sum of 11 positive fifth powers: 799 = 35 + 35 + 35 + 25 + 25 + 15 + 15 + 15 + 15 + 15 + 15.


NGC 799 is a spiral galaxy in the constellation Cetus.

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