Numbers / 719

The Number 719

719 is prime: only 1 and 719 divide it evenly; the next prime after 719 is 727. 719's proper divisors total just 1, 718 short of 719, the deficient case most of 719's neighbors share too. 719 has a digit sum of 17; for 719, the digital root works out to 8. 719 shares no factor with 2-12; 719's own divisors start beyond that range. 719 is 1011001111 in binary and 2CF in hex; as a Roman numeral it's DCCXIX.