44449

This number is a prime.

The smallest prime that does not divide at least one nine-digit zeroless pandigital number. [Wesolowski]

The prime ZIP Code of North Benton, OH, consists of digits that are perfect squares and whose sum of digits is a perfect square. [Green]

Largest prime powered to 6, free of the two digits of the prime (44449^6 = 7712087862231603625058020801). [Rivera]

The smallest prime using four fours. Note the "four fours" game. [Marcel]