687972076 has 12 divisors (see below), whose sum is σ = 1313401320. Its totient is φ = 312714560.

The previous prime is 687972071. The next prime is 687972079. The reversal of 687972076 is 670279786.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (687972071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7817821 + ... + 7817908.

It is an arithmetic number, because the mean of its divisors is an integer number (109450110).

Almost surely, 2^687972076 is an apocalyptic number.

It is an amenable number.

687972076 is a deficient number, since it is larger than the sum of its proper divisors (625429244).

687972076 is a wasteful number, since it uses less digits than its factorization.

687972076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15635744 (or 15635742 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 687972076 is about 26229.2217955470. The cubic root of 687972076 is about 882.7890488506.

The spelling of 687972076 in words is "six hundred eighty-seven million, nine hundred seventy-two thousand, seventy-six".