687461056 has 14 divisors (see below), whose sum is σ = 1364180660. Its totient is φ = 343730496.

The previous prime is 687461041. The next prime is 687461069. The reversal of 687461056 is 650164786.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5370726 + ... + 5370853.

Almost surely, 2^687461056 is an apocalyptic number.

It is an amenable number.

687461056 is a deficient number, since it is larger than the sum of its proper divisors (676719604).

687461056 is a wasteful number, since it uses less digits than its factorization.

687461056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10741591 (or 10741581 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 687461056 is about 26219.4785607952. The cubic root of 687461056 is about 882.5704185610.

The spelling of 687461056 in words is "six hundred eighty-seven million, four hundred sixty-one thousand, fifty-six".