868623 has 24 divisors (see below), whose sum is σ = 1422720. Its totient is φ = 468720.

The previous prime is 868613. The next prime is 868639. The reversal of 868623 is 326868.

It is a Cunningham number, because it is equal to 932²-1.

It is not a de Polignac number, because 868623 - 2⁶ = 868559 is a prime.

It is a super-2 number, since 2×868623² = 1509011832258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2638 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (59280).

2⁸⁶⁸⁶²³ is an apocalyptic number.

868623 is a deficient number, since it is larger than the sum of its proper divisors (554097).

868623 is a wasteful number, since it uses less digits than its factorization.

868623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 340 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 868623 is about 931.9994635192. Note that the first 3 decimals coincide. The cubic root of 868623 is about 95.4136349941.

The spelling of 868623 in words is "eight hundred sixty-eight thousand, six hundred twenty-three".