687976612 has 6 divisors (see below), whose sum is σ = 1203959078. Its totient is φ = 343988304.

The previous prime is 687976603. The next prime is 687976613. The reversal of 687976612 is 216679786.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 687173796 + 802816 = 26214^2 + 896^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 687976612.

It is not an unprimeable number, because it can be changed into a prime (687976613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85997073 + ... + 85997080.

Almost surely, 2^687976612 is an apocalyptic number.

It is an amenable number.

687976612 is a deficient number, since it is larger than the sum of its proper divisors (515982466).

687976612 is a wasteful number, since it uses less digits than its factorization.

687976612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171994157 (or 171994155 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 687976612 is about 26229.3082638487. The cubic root of 687976612 is about 882.7909890080.

The spelling of 687976612 in words is "six hundred eighty-seven million, nine hundred seventy-six thousand, six hundred twelve".