684984904 has 16 divisors (see below), whose sum is σ = 1284677820. Its totient is φ = 342404160.

The previous prime is 684984899. The next prime is 684984931. The reversal of 684984904 is 409489486.

It can be written as a sum of positive squares in 2 ways, for example, as 665536804 + 19448100 = 25798^2 + 4410^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31642 + ... + 48694.

Almost surely, 2^684984904 is an apocalyptic number.

It is an amenable number.

684984904 is a deficient number, since it is larger than the sum of its proper divisors (599692916).

684984904 is a wasteful number, since it uses less digits than its factorization.

684984904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22080 (or 22076 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 684984904 is about 26172.2162607602. The cubic root of 684984904 is about 881.5095062982.

The spelling of 684984904 in words is "six hundred eighty-four million, nine hundred eighty-four thousand, nine hundred four".