864656373 has 32 divisors (see below), whose sum is σ = 1383413760. Its totient is φ = 469909440.

The previous prime is 864656357. The next prime is 864656399. The reversal of 864656373 is 373656468.

It is a happy number.

It is not a de Polignac number, because 864656373 - 2⁴ = 864656357 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864656473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30208 + ... + 51398.

It is an arithmetic number, because the mean of its divisors is an integer number (43231680).

Almost surely, 2^864656373 is an apocalyptic number.

It is an amenable number.

864656373 is a deficient number, since it is larger than the sum of its proper divisors (518757387).

864656373 is a wasteful number, since it uses less digits than its factorization.

864656373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21297.

The product of its digits is 2177280, while the sum is 48.

The square root of 864656373 is about 29405.0399251557. The cubic root of 864656373 is about 952.6817569806.

The spelling of 864656373 in words is "eight hundred sixty-four million, six hundred fifty-six thousand, three hundred seventy-three".