11777

This number is a prime.

+ An emirp since its reversal 77711 is also prime. Note that their blended format 1177711 is a palindromic prime. [De Geest]

+ The smallest emirp p such that p + 2 and p + 6 are emirps. [Firoozbakht]

+ The smallest emirp formed by inserting a semiprime between its prime factors. [Loungrides]

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