Numbers / 727

The Number 727

727 is prime: only 1 and 727 divide it evenly; the next prime after 727 is 733. 727's proper divisors total just 1, 726 short of 727, the deficient case most of 727's neighbors share too. 727 is also a palindrome, since 727 reads identically forwards and backwards. 727 has a digit sum of 16; for 727, the digital root works out to 7. 727 shares no factor with 2-12; 727's own divisors start beyond that range. 727 is 1011010111 in binary and 2D7 in hex; as a Roman numeral it's DCCXXVII.