83

This number is a prime.

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The number of permutations of the 10 distinct digits taken 9 at a time that are perfect squares. These range from 10124² = 102495376 to 30384² = 923187456. [Beiler]

Submitted: 1999-09-02 23:40:00; Last Modified: 2008-07-31 13:54:33.