864670825 has 12 divisors (see below), whose sum is σ = 1072577308. Its totient is φ = 691488000.

The previous prime is 864670801. The next prime is 864670831. The reversal of 864670825 is 528076468.

864670825 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 6 ways, for example, as 258920281 + 605750544 = 16091^2 + 24612^2 .

It is a de Polignac number, because none of the positive numbers 2^k-864670825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100909 + ... + 109141.

Almost surely, 2^864670825 is an apocalyptic number.

It is an amenable number.

864670825 is a deficient number, since it is larger than the sum of its proper divisors (207906483).

864670825 is a wasteful number, since it uses less digits than its factorization.

864670825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12444 (or 12439 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 864670825 is about 29405.2856643155. The cubic root of 864670825 is about 952.6870647076.

The spelling of 864670825 in words is "eight hundred sixty-four million, six hundred seventy thousand, eight hundred twenty-five".