98081

This number is a prime.

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The sum of all the powers x^y, where x, y are distinct prime digits, is a Cyclops emirp, i.e., 2^3+2^5+2^7+3^2+3^5+3^7+5^2+5^3+5^7+7^2+7^3+7^5 = 98081. [Loungrides]