687431876 has 12 divisors (see below), whose sum is σ = 1208040960. Its totient is φ = 342277320.

The previous prime is 687431827. The next prime is 687431891. The reversal of 687431876 is 678134786.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 358580 + ... + 360491.

It is an arithmetic number, because the mean of its divisors is an integer number (100670080).

Almost surely, 2^687431876 is an apocalyptic number.

It is an amenable number.

687431876 is a deficient number, since it is larger than the sum of its proper divisors (520609084).

687431876 is a wasteful number, since it uses less digits than its factorization.

687431876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719314 (or 719312 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The square root of 687431876 is about 26218.9220983625. The cubic root of 687431876 is about 882.5579311777.

The spelling of 687431876 in words is "six hundred eighty-seven million, four hundred thirty-one thousand, eight hundred seventy-six".