# 3407

This number is a prime.

(3407, 7043) is the only pair of 4-digit distinct-digit emirps whose one digit is equal to the sum of the other digits. [Loungrides]

An emirp whose sum of two leftmost digits is equal to the sum of its two rightmost digits. [Forouhari]

(There is one curio for this number that has not yet been approved by an editor.)

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