947

This number is a prime.

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947²=896809 is the smallest circular-digit prime square containing all possible circular digits (0, 6, 8, 9). It also contains as substrings the Cyclops prime 809 and its "blinded" cousin 89. [Leonardis]

Submitted: 2020-01-18 18:16:26; Last Modified: 2020-01-19 02:06:30.