687565996 has 24 divisors (see below), whose sum is σ = 1363999280. Its totient is φ = 300635712.

The previous prime is 687565981. The next prime is 687565997. The reversal of 687565996 is 699565786.

It is not an unprimeable number, because it can be changed into a prime (687565997) 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 7 ways as a sum of consecutive naturals, for example, 346971 + ... + 348946.

Almost surely, 2^687565996 is an apocalyptic number.

It is an amenable number.

687565996 is a deficient number, since it is larger than the sum of its proper divisors (676433284).

687565996 is a wasteful number, since it uses less digits than its factorization.

687565996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695953 (or 695951 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 61.

The square root of 687565996 is about 26221.4796683940. The cubic root of 687565996 is about 882.6153240029.

The spelling of 687565996 in words is "six hundred eighty-seven million, five hundred sixty-five thousand, nine hundred ninety-six".