686808712 has 16 divisors (see below), whose sum is σ = 1319175900. Its totient is φ = 335028480.

The previous prime is 686808677. The next prime is 686808737. The reversal of 686808712 is 217808686.

It can be written as a sum of positive squares in 2 ways, for example, as 684659556 + 2149156 = 26166^2 + 1466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046637 + ... + 1047292.

Almost surely, 2^686808712 is an apocalyptic number.

It is an amenable number.

686808712 is a deficient number, since it is larger than the sum of its proper divisors (632367188).

686808712 is a wasteful number, since it uses less digits than its factorization.

686808712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093976 (or 2093972 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 686808712 is about 26207.0355439145. The cubic root of 686808712 is about 882.2911679678.

The spelling of 686808712 in words is "six hundred eighty-six million, eight hundred eight thousand, seven hundred twelve".