687970716 has 24 divisors (see below), whose sum is σ = 1612343040. Its totient is φ = 228312432.

The previous prime is 687970709. The next prime is 687970721. The reversal of 687970716 is 617079786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123556 + ... + 129003.

It is an arithmetic number, because the mean of its divisors is an integer number (67180960).

Almost surely, 2^687970716 is an apocalyptic number.

It is an amenable number.

687970716 is an abundant number, since it is smaller than the sum of its proper divisors (924372324).

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

687970716 is a wasteful number, since it uses less digits than its factorization.

687970716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252793 (or 252791 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 687970716 is about 26229.1958702512. The cubic root of 687970716 is about 882.7884671439.

The spelling of 687970716 in words is "six hundred eighty-seven million, nine hundred seventy thousand, seven hundred sixteen".