13664393 has 8 divisors (see below), whose sum is σ = 13910400. Its totient is φ = 13420368.

The previous prime is 13664389. The next prime is 13664419. The reversal of 13664393 is 39346631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13664393 - 2² = 13664389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13664303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20930 + ... + 21572.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^13664393 is an apocalyptic number.

It is an amenable number.

13664393 is a deficient number, since it is larger than the sum of its proper divisors (246007).

13664393 is an equidigital number, since it uses as much as digits as its factorization.

13664393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 34992, while the sum is 35.

The square root of 13664393 is about 3696.5379749165. The cubic root of 13664393 is about 239.0727706838.

The spelling of 13664393 in words is "thirteen million, six hundred sixty-four thousand, three hundred ninety-three".