Numbers / 577

The Number 577

577 is prime: only 1 and 577 divide it evenly; the next prime after 577 is 587. 577's proper divisors total just 1, 576 short of 577, the deficient case most of 577's neighbors share too. 577 has a digit sum of 19; for 577, the digital root works out to 1. 577 shares no factor with 2-12; 577's own divisors start beyond that range. 577 is 1001000001 in binary and 241 in hex; as a Roman numeral it's DLXXVII.