Numbers / 307

The Number 307

307 is prime: only 1 and 307 divide it evenly; the next prime after 307 is 311. 307's proper divisors total just 1, 306 short of 307, the deficient case most of 307's neighbors share too. 307 has a digit sum of 10; for 307, the digital root works out to 1. 307 shares no factor with 2-12; 307's own divisors start beyond that range. 307 is 100110011 in binary and 133 in hex; as a Roman numeral it's CCCVII.