Numbers / 83

The Number 83

83 is prime: only 1 and 83 divide it evenly; the next prime after 83 is 89. 83's proper divisors total just 1, 82 short of 83, the deficient case most of 83's neighbors share too. 83 has a digit sum of 11; for 83, the digital root works out to 2. 83 shares no factor with 2-12; 83's own divisors start beyond that range. 83 is 1010011 in binary and 53 in hex; as a Roman numeral it's LXXXIII.