Wednesday, February 10, 2010

839

839 is a prime number.

(839 - 8)8 + (839 - 3)3 + (839 - 9)9 is a prime.

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

839 has a base 5 representation (11324) that begins with its base 9 representation (1132).

839 is 31013 in base 4.

Charles the Fat, Holy Roman Emperor, was born in the year 839.

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