Numbers / 723

The Number 723

723 is composite: factorization 3 × 241. That gives 723 exactly 4 divisors: 1, 3, 241, 723. 723's proper divisors total just 245, 478 short of 723, the deficient case most of 723's neighbors share too. 723 has a digit sum of 12; for 723, the digital root works out to 3. 723: 3 all divide 723 evenly, out of 2-12. 723 is 1011010011 in binary and 2D3 in hex; as a Roman numeral it's DCCXXIII.