687056885 has 32 divisors (see below), whose sum is σ = 873331200. Its totient is φ = 518192640.

The previous prime is 687056873. The next prime is 687056939. The reversal of 687056885 is 588650786.

It is not a de Polignac number, because 687056885 - 2¹⁰ = 687055861 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1812626 + ... + 1813004.

It is an arithmetic number, because the mean of its divisors is an integer number (27291600).

Almost surely, 2^687056885 is an apocalyptic number.

It is an amenable number.

687056885 is a deficient number, since it is larger than the sum of its proper divisors (186274315).

687056885 is a wasteful number, since it uses less digits than its factorization.

687056885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The square root of 687056885 is about 26211.7699707593. The cubic root of 687056885 is about 882.3974248602.

The spelling of 687056885 in words is "six hundred eighty-seven million, fifty-six thousand, eight hundred eighty-five".