687859506 has 32 divisors (see below), whose sum is σ = 1529670720. Its totient is φ = 229122432.

The previous prime is 687859499. The next prime is 687859541. The reversal of 687859506 is 605958786.

687859506 is a `hidden beast` number, since 6 + 87 + 8 + 59 + 506 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89346 + ... + 96738.

It is an arithmetic number, because the mean of its divisors is an integer number (47802210).

Almost surely, 2^687859506 is an apocalyptic number.

687859506 is an abundant number, since it is smaller than the sum of its proper divisors (841811214).

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

687859506 is a wasteful number, since it uses less digits than its factorization.

687859506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9127 (or 9121 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The square root of 687859506 is about 26227.0758187031. The cubic root of 687859506 is about 882.7408971948.

The spelling of 687859506 in words is "six hundred eighty-seven million, eight hundred fifty-nine thousand, five hundred six".