Numbers / 983

The Number 983

983 is prime: only 1 and 983 divide it evenly; the next prime after 983 is 991. 983's proper divisors total just 1, 982 short of 983, the deficient case most of 983's neighbors share too. 983 has a digit sum of 20; for 983, the digital root works out to 2. 983 shares no factor with 2-12; 983's own divisors start beyond that range. 983 is 1111010111 in binary and 3D7 in hex; as a Roman numeral it's CMLXXXIII.