Numbers / 603

The Number 603

603 is composite: factorization 3^2 × 67. That gives 603 exactly 6 divisors: 1, 3, 9, 67, 201, 603. 603's proper divisors total just 281, 322 short of 603, the deficient case most of 603's neighbors share too. 603 has a digit sum of 9; for 603, the digital root works out to 9. 603: 3, 9 all divide 603 evenly, out of 2-12. 603 is 1001011011 in binary and 25B in hex; as a Roman numeral it's DCIII.