688954475 has 24 divisors (see below), whose sum is σ = 933368832. Its totient is φ = 500304800.

The previous prime is 688954451. The next prime is 688954477. The reversal of 688954475 is 574459886.

It is a happy number.

It is not a de Polignac number, because 688954475 - 2¹⁴ = 688938091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688954475.

It is not an unprimeable number, because it can be changed into a prime (688954477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235874 + ... + 238776.

It is an arithmetic number, because the mean of its divisors is an integer number (38890368).

Almost surely, 2^688954475 is an apocalyptic number.

688954475 is a deficient number, since it is larger than the sum of its proper divisors (244414357).

688954475 is a wasteful number, since it uses less digits than its factorization.

688954475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787 (or 3782 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The square root of 688954475 is about 26247.9423003023. The cubic root of 688954475 is about 883.2090458414.

The spelling of 688954475 in words is "six hundred eighty-eight million, nine hundred fifty-four thousand, four hundred seventy-five".