688313825 has 12 divisors (see below), whose sum is σ = 871670400. Its totient is φ = 538934160.

The previous prime is 688313819. The next prime is 688313837. The reversal of 688313825 is 528313886.

It is not a de Polignac number, because 688313825 - 2¹⁸ = 688051681 is a prime.

It is a super-2 number, since 2×688313825² = 947551843372261250, which contains 22 as substring.

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, 291725 + ... + 294074.

It is an arithmetic number, because the mean of its divisors is an integer number (72639200).

Almost surely, 2^688313825 is an apocalyptic number.

It is an amenable number.

688313825 is a deficient number, since it is larger than the sum of its proper divisors (183356575).

688313825 is a wasteful number, since it uses less digits than its factorization.

688313825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585856 (or 585851 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 688313825 is about 26235.7356481575. The cubic root of 688313825 is about 882.9351993238.

The spelling of 688313825 in words is "six hundred eighty-eight million, three hundred thirteen thousand, eight hundred twenty-five".