687081068 has 24 divisors (see below), whose sum is σ = 1222734240. Its totient is φ = 337772160.

The previous prime is 687081067. The next prime is 687081071. The reversal of 687081068 is 860180786.

It is not an unprimeable number, because it can be changed into a prime (687081067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59105 + ... + 69767.

It is an arithmetic number, because the mean of its divisors is an integer number (50947260).

Almost surely, 2^687081068 is an apocalyptic number.

It is an amenable number.

687081068 is a deficient number, since it is larger than the sum of its proper divisors (535653172).

687081068 is a wasteful number, since it uses less digits than its factorization.

687081068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10937 (or 10935 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 687081068 is about 26212.2312671012. The cubic root of 687081068 is about 882.4077776015.

The spelling of 687081068 in words is "six hundred eighty-seven million, eighty-one thousand, sixty-eight".