647325904 has 20 divisors (see below), whose sum is σ = 1258864740. Its totient is φ = 322457600.

The previous prime is 647325871. The next prime is 647325923. The reversal of 647325904 is 409523746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 248125504 + 399200400 = 15752^2 + 19980^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70897 + ... + 79504.

It is an arithmetic number, because the mean of its divisors is an integer number (62943237).

Almost surely, 2^647325904 is an apocalyptic number.

It is an amenable number.

647325904 is a deficient number, since it is larger than the sum of its proper divisors (611538836).

647325904 is a wasteful number, since it uses less digits than its factorization.

647325904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150678 (or 150672 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 647325904 is about 25442.6001815852. The cubic root of 647325904 is about 865.0495718191.

The spelling of 647325904 in words is "six hundred forty-seven million, three hundred twenty-five thousand, nine hundred four".