Numbers / 599

The Number 599

599 is prime: only 1 and 599 divide it evenly; the next prime after 599 is 601. 599's proper divisors total just 1, 598 short of 599, the deficient case most of 599's neighbors share too. 599 has a digit sum of 23; for 599, the digital root works out to 5. 599 shares no factor with 2-12; 599's own divisors start beyond that range. 599 is 1001010111 in binary and 257 in hex; as a Roman numeral it's DXCIX.