687058636 has 12 divisors (see below), whose sum is σ = 1311657480. Its totient is φ = 312299360.

The previous prime is 687058613. The next prime is 687058637. The reversal of 687058636 is 636850786.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 687058636.

It is not an unprimeable number, because it can be changed into a prime (687058637) by changing a digit.

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, 7807441 + ... + 7807528.

It is an arithmetic number, because the mean of its divisors is an integer number (109304790).

Almost surely, 2^687058636 is an apocalyptic number.

It is an amenable number.

687058636 is a deficient number, since it is larger than the sum of its proper divisors (624598844).

687058636 is a wasteful number, since it uses less digits than its factorization.

687058636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15614984 (or 15614982 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 687058636 is about 26211.8033717636. The cubic root of 687058636 is about 882.3981744713.

The spelling of 687058636 in words is "six hundred eighty-seven million, fifty-eight thousand, six hundred thirty-six".