Numbers / 703

The Number 703

703 is composite: factorization 19 × 37. That gives 703 exactly 4 divisors: 1, 19, 37, 703. 703's proper divisors total just 57, 646 short of 703, the deficient case most of 703's neighbors share too. 703 is also the 37th triangular number, the sum of 1 through 37. 703 has a digit sum of 10; for 703, the digital root works out to 1. 703 shares no factor with 2-12; 703's own divisors start beyond that range. 703 is 1010111111 in binary and 2BF in hex; as a Roman numeral it's DCCIII.