686223 has 12 divisors (see below), whose sum is σ = 1043640. Its totient is φ = 433296.

The previous prime is 686209. The next prime is 686267. The reversal of 686223 is 322686.

It is not a de Polignac number, because 686223 - 2¹⁰ = 685199 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1836 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (86970).

2⁶⁸⁶²²³ is an apocalyptic number.

686223 is a deficient number, since it is larger than the sum of its proper divisors (357417).

686223 is a wasteful number, since it uses less digits than its factorization.

686223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4035 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 686223 is about 828.3857796945. The cubic root of 686223 is about 88.2040290013.

It can be divided in two parts, 686 and 223, that added together give a palindrome (909).

The spelling of 686223 in words is "six hundred eighty-six thousand, two hundred twenty-three".