Numbers / 947

The Number 947

947 is prime: only 1 and 947 divide it evenly; the next prime after 947 is 953. 947's proper divisors total just 1, 946 short of 947, the deficient case most of 947's neighbors share too. 947 has a digit sum of 20; for 947, the digital root works out to 2. 947 shares no factor with 2-12; 947's own divisors start beyond that range. 947 is 1110110011 in binary and 3B3 in hex; as a Roman numeral it's CMXLVII.