864825731 has 32 divisors (see below), whose sum is σ = 1107357696. Its totient is φ = 655920000.

The previous prime is 864825707. The next prime is 864825739. The reversal of 864825731 is 137528468.

It is a cyclic number.

It is not a de Polignac number, because 864825731 - 2⁶ = 864825667 is a prime.

It is a super-2 number, since 2×864825731² = 1495847089999368722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (864825739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473486 + ... + 475308.

It is an arithmetic number, because the mean of its divisors is an integer number (34604928).

Almost surely, 2^864825731 is an apocalyptic number.

864825731 is a deficient number, since it is larger than the sum of its proper divisors (242531965).

864825731 is a wasteful number, since it uses less digits than its factorization.

864825731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003.

The product of its digits is 322560, while the sum is 44.

The square root of 864825731 is about 29407.9195285896. The cubic root of 864825731 is about 952.7439526879.

The spelling of 864825731 in words is "eight hundred sixty-four million, eight hundred twenty-five thousand, seven hundred thirty-one".