Numbers / 487

The Number 487

487 is prime: only 1 and 487 divide it evenly; the next prime after 487 is 491. 487's proper divisors total just 1, 486 short of 487, the deficient case most of 487's neighbors share too. 487 has a digit sum of 19; for 487, the digital root works out to 1. 487 shares no factor with 2-12; 487's own divisors start beyond that range. 487 is 111100111 in binary and 1E7 in hex; as a Roman numeral it's CDLXXXVII.