127
This number is a prime.
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The largest sum of digits of the square of a distinct digit
brilliant number (924107563^2 = 853974787993798969 and
948302567^2 = 899277758578789489). [Gaydos]
Submitted: 2020-08-24 14:05:52; Last Modified: 2020-08-24 14:26:51.
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