687631375 has 32 divisors (see below), whose sum is σ = 906796800. Its totient is φ = 519156000.

The previous prime is 687631363. The next prime is 687631397. The reversal of 687631375 is 573136786.

It is not a de Polignac number, because 687631375 - 2⁹ = 687630863 is a prime.

Its product of digits (635040) is a multiple of the sum of its prime divisors (1134).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 994780 + ... + 995470.

It is an arithmetic number, because the mean of its divisors is an integer number (28337400).

Almost surely, 2^687631375 is an apocalyptic number.

687631375 is a deficient number, since it is larger than the sum of its proper divisors (219165425).

687631375 is a wasteful number, since it uses less digits than its factorization.

687631375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1134 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The square root of 687631375 is about 26222.7263075371. The cubic root of 687631375 is about 882.6432983737.

The spelling of 687631375 in words is "six hundred eighty-seven million, six hundred thirty-one thousand, three hundred seventy-five".