13987564 has 12 divisors (see below), whose sum is σ = 24504424. Its totient is φ = 6986304.

The previous prime is 13987559. The next prime is 13987573. The reversal of 13987564 is 46578931.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13987564.

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, 6532 + ... + 8404.

Almost surely, 2^13987564 is an apocalyptic number.

It is an amenable number.

13987564 is a deficient number, since it is larger than the sum of its proper divisors (10516860).

13987564 is a wasteful number, since it uses less digits than its factorization.

13987564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744 (or 3742 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 13987564 is about 3739.9951871627. The cubic root of 13987564 is about 240.9428421120.

The spelling of 13987564 in words is "thirteen million, nine hundred eighty-seven thousand, five hundred sixty-four".