687473564 has 12 divisors (see below), whose sum is σ = 1204075824. Its totient is φ = 343451904.

The previous prime is 687473539. The next prime is 687473587. The reversal of 687473564 is 465374786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65744 + ... + 75479.

It is an arithmetic number, because the mean of its divisors is an integer number (100339652).

Almost surely, 2^687473564 is an apocalyptic number.

It is an amenable number.

687473564 is a deficient number, since it is larger than the sum of its proper divisors (516602260).

687473564 is a wasteful number, since it uses less digits than its factorization.

687473564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142444 (or 142442 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 50.

The square root of 687473564 is about 26219.7170846674. The cubic root of 687473564 is about 882.5757711667.

The spelling of 687473564 in words is "six hundred eighty-seven million, four hundred seventy-three thousand, five hundred sixty-four".