916

This number is a composite.

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When 916 is raised to the sum of its digits and increased by one, the result is prime (i.e., 916^(9+1+6)+1 is prime). It is the largest such 3-digit number. [Opao]

Submitted: 2003-11-20 03:09:54; Last Modified: 2008-01-30 17:28:00.