688704825 has 12 divisors (see below), whose sum is σ = 1138658768. Its totient is φ = 367309200.

The previous prime is 688704811. The next prime is 688704851. The reversal of 688704825 is 528407886.

It is not a de Polignac number, because 688704825 - 2¹⁰ = 688703801 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, 4591291 + ... + 4591440.

Almost surely, 2^688704825 is an apocalyptic number.

It is an amenable number.

688704825 is a deficient number, since it is larger than the sum of its proper divisors (449953943).

688704825 is a wasteful number, since it uses less digits than its factorization.

688704825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182744 (or 9182739 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 688704825 is about 26243.1862585319. The cubic root of 688704825 is about 883.1023528816.

The spelling of 688704825 in words is "six hundred eighty-eight million, seven hundred four thousand, eight hundred twenty-five".