13568399 has 4 divisors (see below), whose sum is σ = 14612136. Its totient is φ = 12524664.

The previous prime is 13568389. The next prime is 13568419. The reversal of 13568399 is 99386531.

13568399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99386531 = 3823 ⋅25997.

It is a cyclic number.

It is not a de Polignac number, because 13568399 - 2¹² = 13564303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13568339) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 521849 + ... + 521874.

It is an arithmetic number, because the mean of its divisors is an integer number (3653034).

Almost surely, 2^13568399 is an apocalyptic number.

13568399 is a deficient number, since it is larger than the sum of its proper divisors (1043737).

13568399 is a wasteful number, since it uses less digits than its factorization.

13568399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043736.

The product of its digits is 174960, while the sum is 44.

The square root of 13568399 is about 3683.5307790217. The cubic root of 13568399 is about 238.5116162684.

The spelling of 13568399 in words is "thirteen million, five hundred sixty-eight thousand, three hundred ninety-nine".