13989566 has 16 divisors (see below), whose sum is σ = 22032000. Its totient is φ = 6649368.

The previous prime is 13989541. The next prime is 13989581. The reversal of 13989566 is 66598931.

It is a self number, because there is not a number n which added to its sum of digits gives 13989566.

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, 7385 + ... + 9083.

It is an arithmetic number, because the mean of its divisors is an integer number (1377000).

Almost surely, 2^13989566 is an apocalyptic number.

13989566 is a deficient number, since it is larger than the sum of its proper divisors (8042434).

13989566 is a wasteful number, since it uses less digits than its factorization.

13989566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903.

The product of its digits is 349920, while the sum is 47.

The square root of 13989566 is about 3740.2628249897. The cubic root of 13989566 is about 240.9543367168.

The spelling of 13989566 in words is "thirteen million, nine hundred eighty-nine thousand, five hundred sixty-six".