8821

This number is a prime.

+ The largest 4-digit prime whose the reversal is a nude number, i.e., a number that is divisible by all of its digits. [Loungrides]

+ The smallest prime such that replacing each digit d with d^3 yields a perfect square, i.e., 8821 -> 51251281 -> 7159^2. [Bajpai]

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