Numbers / 149

The Number 149

149 is prime: only 1 and 149 divide it evenly; the next prime after 149 is 151. 149's proper divisors total just 1, 148 short of 149, the deficient case most of 149's neighbors share too. 149 has a digit sum of 14; for 149, the digital root works out to 5. 149 shares no factor with 2-12; 149's own divisors start beyond that range. 149 is 10010101 in binary and 95 in hex; as a Roman numeral it's CXLIX.