7237

This number is a prime.

+ The smallest prime, (and the only prime-digit prime), that can be expressed as sum of powers using all the odd-digits as bases and all the even digits as exponents, i.e., 1^6+3^8+5^4+7^2+9^0. [Loungrides]

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

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