688882625 has 8 divisors (see below), whose sum is σ = 859725672. Its totient is φ = 551106000.

The previous prime is 688882603. The next prime is 688882631. The reversal of 688882625 is 526288886.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 688170289 = 844^2 + 26233^2 .

It is not a de Polignac number, because 688882625 - 2¹² = 688878529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2755406 + ... + 2755655.

It is an arithmetic number, because the mean of its divisors is an integer number (107465709).

Almost surely, 2^688882625 is an apocalyptic number.

It is an amenable number.

688882625 is a deficient number, since it is larger than the sum of its proper divisors (170843047).

688882625 is an equidigital number, since it uses as much as digits as its factorization.

688882625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511076 (or 5511066 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The square root of 688882625 is about 26246.5735858988. The cubic root of 688882625 is about 883.1783419375.

The spelling of 688882625 in words is "six hundred eighty-eight million, eight hundred eighty-two thousand, six hundred twenty-five".