Numbers / 547

The Number 547

547 is prime: only 1 and 547 divide it evenly; the next prime after 547 is 557. 547's proper divisors total just 1, 546 short of 547, the deficient case most of 547's neighbors share too. 547 has a digit sum of 16; for 547, the digital root works out to 7. 547 shares no factor with 2-12; 547's own divisors start beyond that range. 547 is 1000100011 in binary and 223 in hex; as a Roman numeral it's DXLVII.