Numbers / 761

The Number 761

761 is prime: only 1 and 761 divide it evenly; the next prime after 761 is 769. 761's proper divisors total just 1, 760 short of 761, the deficient case most of 761's neighbors share too. 761 has a digit sum of 14; for 761, the digital root works out to 5. 761 shares no factor with 2-12; 761's own divisors start beyond that range. 761 is 1011111001 in binary and 2F9 in hex; as a Roman numeral it's DCCLXI.