13993566 has 16 divisors (see below), whose sum is σ = 28024704. Its totient is φ = 4658264.

The previous prime is 13993549. The next prime is 13993579. The reversal of 13993566 is 66539931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6385 + ... + 8291.

It is an arithmetic number, because the mean of its divisors is an integer number (1751544).

Almost surely, 2^13993566 is an apocalyptic number.

13993566 is an abundant number, since it is smaller than the sum of its proper divisors (14031138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13993566 is a wasteful number, since it uses less digits than its factorization.

13993566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135.

The product of its digits is 131220, while the sum is 42.

The square root of 13993566 is about 3740.7975085535. The cubic root of 13993566 is about 240.9772996760.

The spelling of 13993566 in words is "thirteen million, nine hundred ninety-three thousand, five hundred sixty-six".