Numbers / 297

The Number 297

297 is composite: factorization 3^3 × 11. That gives 297 exactly 8 divisors: 1, 3, 9, 11, 27, 33, 99, 297. 297's proper divisors total just 183, 114 short of 297, the deficient case most of 297's neighbors share too. 297 has a digit sum of 18; for 297, the digital root works out to 9. 297: 3, 9, 11 all divide 297 evenly, out of 2-12. 297 is 100101001 in binary and 129 in hex; as a Roman numeral it's CCXCVII.