Numbers / 939

The Number 939

939 is composite: factorization 3 × 313. That gives 939 exactly 4 divisors: 1, 3, 313, 939. 939's proper divisors total just 317, 622 short of 939, the deficient case most of 939's neighbors share too. 939 is also a palindrome, since 939 reads identically forwards and backwards. 939 has a digit sum of 21; for 939, the digital root works out to 3. 939: 3 all divide 939 evenly, out of 2-12. 939 is 1110101011 in binary and 3AB in hex; as a Roman numeral it's CMXXXIX.