Numbers / 713

The Number 713

713 is composite: factorization 23 × 31. That gives 713 exactly 4 divisors: 1, 23, 31, 713. 713's proper divisors total just 55, 658 short of 713, the deficient case most of 713's neighbors share too. 713 has a digit sum of 11; for 713, the digital root works out to 2. 713 shares no factor with 2-12; 713's own divisors start beyond that range. 713 is 1011001001 in binary and 2C9 in hex; as a Roman numeral it's DCCXIII.