Numbers / 797

The Number 797

797 is prime: only 1 and 797 divide it evenly; the next prime after 797 is 809. 797's proper divisors total just 1, 796 short of 797, the deficient case most of 797's neighbors share too. 797 is also a palindrome, since 797 reads identically forwards and backwards. 797 has a digit sum of 23; for 797, the digital root works out to 5. 797 shares no factor with 2-12; 797's own divisors start beyond that range. 797 is 1100011101 in binary and 31D in hex; as a Roman numeral it's DCCXCVII.