687059656 has 16 divisors (see below), whose sum is σ = 1288566000. Its totient is φ = 343442064.

The previous prime is 687059609. The next prime is 687059693. The reversal of 687059656 is 656950786.

687059656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32371 + ... + 49213.

It is an arithmetic number, because the mean of its divisors is an integer number (80535375).

Almost surely, 2^687059656 is an apocalyptic number.

It is an amenable number.

687059656 is a deficient number, since it is larger than the sum of its proper divisors (601506344).

687059656 is a wasteful number, since it uses less digits than its factorization.

687059656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21948 (or 21944 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The square root of 687059656 is about 26211.8228286398. The cubic root of 687059656 is about 882.3986111375.

The spelling of 687059656 in words is "six hundred eighty-seven million, fifty-nine thousand, six hundred fifty-six".