9911

This number is a composite.

+ The sum of prime factors of 9911 (11 + 17 + 53) is equal to the product of digits of 9911 (9 * 9 * 1 * 1). [Gudipati]

+ The largest zygodrome 2-sphenic number, i.e., 9911 = 11 x 17 x 53. [Loungrides]

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