687791308 has 12 divisors (see below), whose sum is σ = 1214678080. Its totient is φ = 340740432.

The previous prime is 687791297. The next prime is 687791309. The reversal of 687791308 is 803197786.

It is not an unprimeable number, because it can be changed into a prime (687791309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788316 + ... + 789187.

Almost surely, 2^687791308 is an apocalyptic number.

It is an amenable number.

687791308 is a deficient number, since it is larger than the sum of its proper divisors (526886772).

687791308 is a wasteful number, since it uses less digits than its factorization.

687791308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577616 (or 1577614 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 687791308 is about 26225.7756415325. The cubic root of 687791308 is about 882.7117230428.

The spelling of 687791308 in words is "six hundred eighty-seven million, seven hundred ninety-one thousand, three hundred eight".