Numbers / 873

The Number 873

873 is composite: factorization 3^2 × 97. That gives 873 exactly 6 divisors: 1, 3, 9, 97, 291, 873. 873's proper divisors total just 401, 472 short of 873, the deficient case most of 873's neighbors share too. 873 has a digit sum of 18; for 873, the digital root works out to 9. 873: 3, 9 all divide 873 evenly, out of 2-12. 873 is 1101101001 in binary and 369 in hex; as a Roman numeral it's DCCCLXXIII.