Numbers / 117

The Number 117

117 is composite: factorization 3^2 × 13. That gives 117 exactly 6 divisors: 1, 3, 9, 13, 39, 117. 117's proper divisors total just 65, 52 short of 117, the deficient case most of 117's neighbors share too. 117 has a digit sum of 9; for 117, the digital root works out to 9. 117: 3, 9 all divide 117 evenly, out of 2-12. 117 is 1110101 in binary and 75 in hex; as a Roman numeral it's CXVII.