Numbers / 103

The Number 103

103 is prime: only 1 and 103 divide it evenly; the next prime after 103 is 107. 103's proper divisors total just 1, 102 short of 103, the deficient case most of 103's neighbors share too. 103 has a digit sum of 4; for 103, the digital root works out to 4. 103 shares no factor with 2-12; 103's own divisors start beyond that range. 103 is 1100111 in binary and 67 in hex; as a Roman numeral it's CIII.