359

This number is a prime.

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359 = prime(phi(3*5*9)) = prime(phi(3*5*9 + 3+5+9)). It is the only known multidigit number with this property. [Firoozbakht]

Submitted: 2010-07-09 00:04:48;   Last Modified: 2020-07-24 14:35:12.
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