Numbers / 877

The Number 877

877 is prime: only 1 and 877 divide it evenly; the next prime after 877 is 881. 877's proper divisors total just 1, 876 short of 877, the deficient case most of 877's neighbors share too. 877 has a digit sum of 22; for 877, the digital root works out to 4. 877 shares no factor with 2-12; 877's own divisors start beyond that range. 877 is 1101101101 in binary and 36D in hex; as a Roman numeral it's DCCCLXXVII.