Numbers / 899

The Number 899

899 is composite: factorization 29 × 31. That gives 899 exactly 4 divisors: 1, 29, 31, 899. 899's proper divisors total just 61, 838 short of 899, the deficient case most of 899's neighbors share too. 899 has a digit sum of 26; for 899, the digital root works out to 8. 899 shares no factor with 2-12; 899's own divisors start beyond that range. 899 is 1110000011 in binary and 383 in hex; as a Roman numeral it's DCCCXCIX.