Numbers / 977

The Number 977

977 is prime: only 1 and 977 divide it evenly; the next prime after 977 is 983. 977's proper divisors total just 1, 976 short of 977, the deficient case most of 977's neighbors share too. 977 has a digit sum of 23; for 977, the digital root works out to 5. 977 shares no factor with 2-12; 977's own divisors start beyond that range. 977 is 1111010001 in binary and 3D1 in hex; as a Roman numeral it's CMLXXVII.