688375 has 8 divisors (see below), whose sum is σ = 859248. Its totient is φ = 550600.

The previous prime is 688357. The next prime is 688379. The reversal of 688375 is 573886.

688375 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688375 - 2¹⁷ = 557303 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 (688379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2629 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (107406).

2⁶⁸⁸³⁷⁵ is an apocalyptic number.

688375 is a deficient number, since it is larger than the sum of its proper divisors (170873).

688375 is an equidigital number, since it uses as much as digits as its factorization.

688375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522 (or 5512 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 688375 is about 829.6836746616. The cubic root of 688375 is about 88.2961355978.

The spelling of 688375 in words is "six hundred eighty-eight thousand, three hundred seventy-five".