Numbers / 971

The Number 971

971 is prime: only 1 and 971 divide it evenly; the next prime after 971 is 977. 971's proper divisors total just 1, 970 short of 971, the deficient case most of 971's neighbors share too. 971 has a digit sum of 17; for 971, the digital root works out to 8. 971 shares no factor with 2-12; 971's own divisors start beyond that range. 971 is 1111001011 in binary and 3CB in hex; as a Roman numeral it's CMLXXI.