688723225 has 24 divisors (see below), whose sum is σ = 872712000. Its totient is φ = 539010240.

The previous prime is 688723219. The next prime is 688723237. The reversal of 688723225 is 522327886.

It is not a de Polignac number, because 688723225 - 2²⁵ = 655168793 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336756 + ... + 338794.

It is an arithmetic number, because the mean of its divisors is an integer number (36363000).

Almost surely, 2^688723225 is an apocalyptic number.

It is an amenable number.

688723225 is a deficient number, since it is larger than the sum of its proper divisors (183988775).

688723225 is a wasteful number, since it uses less digits than its factorization.

688723225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2332 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 688723225 is about 26243.5368233781. The cubic root of 688723225 is about 883.1102173725.

The spelling of 688723225 in words is "six hundred eighty-eight million, seven hundred twenty-three thousand, two hundred twenty-five".