688912653 has 24 divisors (see below), whose sum is σ = 1087318624. Its totient is φ = 385403040.

The previous prime is 688912619. The next prime is 688912729. The reversal of 688912653 is 356219886.

It is a happy number.

It is not a de Polignac number, because 688912653 - 2⁸ = 688912397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688912613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68275 + ... + 77712.

Almost surely, 2^688912653 is an apocalyptic number.

It is an amenable number.

688912653 is a deficient number, since it is larger than the sum of its proper divisors (398405971).

688912653 is a wasteful number, since it uses less digits than its factorization.

688912653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146025 (or 146014 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 688912653 is about 26247.1456162380. The cubic root of 688912653 is about 883.1911741641.

The spelling of 688912653 in words is "six hundred eighty-eight million, nine hundred twelve thousand, six hundred fifty-three".