8388607

This number is a composite.

The smallest Mersenne Smith number is M(23) = 8388607 = 47 × 178481, and 8 + 3 + 8 + 8 + 6 + 0 + 7 = 4 + 7 + 1 + 7 + 8 + 4 + 8 + 1. [Gupta]

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