688475 has 6 divisors (see below), whose sum is σ = 853740. Its totient is φ = 550760.

The previous prime is 688453. The next prime is 688477. The reversal of 688475 is 574886.

It is not a de Polignac number, because 688475 - 2⁶ = 688411 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688475.

It is not an unprimeable number, because it can be changed into a prime (688477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13745 + ... + 13794.

It is an arithmetic number, because the mean of its divisors is an integer number (142290).

2⁶⁸⁸⁴⁷⁵ is an apocalyptic number.

688475 is a deficient number, since it is larger than the sum of its proper divisors (165265).

688475 is a wasteful number, since it uses less digits than its factorization.

688475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27549 (or 27544 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 688475 is about 829.7439364045. The cubic root of 688475 is about 88.3004109739.

The spelling of 688475 in words is "six hundred eighty-eight thousand, four hundred seventy-five".