688875125 has 8 divisors (see below), whose sum is σ = 859716312. Its totient is φ = 551100000.

The previous prime is 688875119. The next prime is 688875163. The reversal of 688875125 is 521578886.

It can be written as a sum of positive squares in 4 ways, for example, as 207994084 + 480881041 = 14422^2 + 21929^2 .

It is not a de Polignac number, because 688875125 - 2⁸ = 688874869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2755376 + ... + 2755625.

It is an arithmetic number, because the mean of its divisors is an integer number (107464539).

Almost surely, 2^688875125 is an apocalyptic number.

It is an amenable number.

688875125 is a deficient number, since it is larger than the sum of its proper divisors (170841187).

688875125 is an equidigital number, since it uses as much as digits as its factorization.

688875125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511016 (or 5511006 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 50.

The square root of 688875125 is about 26246.4307097175. The cubic root of 688875125 is about 883.1751368140.

The spelling of 688875125 in words is "six hundred eighty-eight million, eight hundred seventy-five thousand, one hundred twenty-five".