686910654 has 12 divisors (see below), whose sum is σ = 1488306456. Its totient is φ = 228970212.

The previous prime is 686910649. The next prime is 686910671. The reversal of 686910654 is 456019686.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 19080834 + ... + 19080869.

It is an arithmetic number, because the mean of its divisors is an integer number (124025538).

Almost surely, 2^686910654 is an apocalyptic number.

686910654 is an abundant number, since it is smaller than the sum of its proper divisors (801395802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686910654 is a wasteful number, since it uses less digits than its factorization.

686910654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38161711 (or 38161708 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 686910654 is about 26208.9804074863. The cubic root of 686910654 is about 882.3348181987.

The spelling of 686910654 in words is "six hundred eighty-six million, nine hundred ten thousand, six hundred fifty-four".