Numbers / 349

The Number 349

349 is prime: only 1 and 349 divide it evenly; the next prime after 349 is 353. 349's proper divisors total just 1, 348 short of 349, the deficient case most of 349's neighbors share too. 349 has a digit sum of 16; for 349, the digital root works out to 7. 349 shares no factor with 2-12; 349's own divisors start beyond that range. 349 is 101011101 in binary and 15D in hex; as a Roman numeral it's CCCXLIX.