Numbers / 497

The Number 497

497 is composite: factorization 7 × 71. That gives 497 exactly 4 divisors: 1, 7, 71, 497. 497's proper divisors total just 79, 418 short of 497, the deficient case most of 497's neighbors share too. 497 has a digit sum of 20; for 497, the digital root works out to 2. 497: 7 all divide 497 evenly, out of 2-12. 497 is 111110001 in binary and 1F1 in hex; as a Roman numeral it's CDXCVII.