1403519

This number is a composite.

+ The smallest sphenic number whose the prime factors are emirps, a 2-digit, a 3-digit and a 4-digit, i.e., 13, 107, 1009 and whose two of the concatenations, i.e, 100913107, 131009107 are, the smaller one a prime and the other an emirp.[ [Loungrides]

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