653864 has 24 divisors (see below), whose sum is σ = 1286490. Its totient is φ = 311328.

The previous prime is 653831. The next prime is 653879. The reversal of 653864 is 468356.

653864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 220900 = 658^2 + 470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 653864.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653864.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13889 + ... + 13935.

2⁶⁵³⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

653864 is a deficient number, since it is larger than the sum of its proper divisors (632626).

653864 is a wasteful number, since it uses less digits than its factorization.

653864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 86 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 653864 is about 808.6185751020. The cubic root of 653864 is about 86.7952201350.

The spelling of 653864 in words is "six hundred fifty-three thousand, eight hundred sixty-four".