687476994 has 16 divisors (see below), whose sum is σ = 1375953600. Its totient is φ = 228992400.

The previous prime is 687476963. The next prime is 687477023. The reversal of 687476994 is 499674786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32557 + ... + 49344.

It is an arithmetic number, because the mean of its divisors is an integer number (85997100).

Almost surely, 2^687476994 is an apocalyptic number.

687476994 is an abundant number, since it is smaller than the sum of its proper divisors (688476606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687476994 is a wasteful number, since it uses less digits than its factorization.

687476994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83305.

The product of its digits is 18289152, while the sum is 60.

The square root of 687476994 is about 26219.7824933770. The cubic root of 687476994 is about 882.5772389709.

The spelling of 687476994 in words is "six hundred eighty-seven million, four hundred seventy-six thousand, nine hundred ninety-four".