Numbers / 739

The Number 739

739 is prime: only 1 and 739 divide it evenly; the next prime after 739 is 743. 739's proper divisors total just 1, 738 short of 739, the deficient case most of 739's neighbors share too. 739 has a digit sum of 19; for 739, the digital root works out to 1. 739 shares no factor with 2-12; 739's own divisors start beyond that range. 739 is 1011100011 in binary and 2E3 in hex; as a Roman numeral it's DCCXXXIX.