687086572 has 6 divisors (see below), whose sum is σ = 1202401508. Its totient is φ = 343543284.

The previous prime is 687086549. The next prime is 687086611. The reversal of 687086572 is 275680786.

It is a super-2 number, since 2×687086572² = 944175914845422368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85885818 + ... + 85885825.

Almost surely, 2^687086572 is an apocalyptic number.

It is an amenable number.

687086572 is a deficient number, since it is larger than the sum of its proper divisors (515314936).

687086572 is a wasteful number, since it uses less digits than its factorization.

687086572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171771647 (or 171771645 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 687086572 is about 26212.3362560455. The cubic root of 687086572 is about 882.4101338297.

The spelling of 687086572 in words is "six hundred eighty-seven million, eighty-six thousand, five hundred seventy-two".