13568389 has 2 divisors, whose sum is σ = 13568390. Its totient is φ = 13568388.

The previous prime is 13568341. The next prime is 13568419. The reversal of 13568389 is 98386531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9333025 + 4235364 = 3055^2 + 2058^2 .

It is a cyclic number.

It is not a de Polignac number, because 13568389 - 2⁹ = 13567877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13568339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6784194 + 6784195.

It is an arithmetic number, because the mean of its divisors is an integer number (6784195).

Almost surely, 2^13568389 is an apocalyptic number.

It is an amenable number.

13568389 is a deficient number, since it is larger than the sum of its proper divisors (1).

13568389 is an equidigital number, since it uses as much as digits as its factorization.

13568389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 13568389 is about 3683.5294216281. The cubic root of 13568389 is about 238.5115576735.

The spelling of 13568389 in words is "thirteen million, five hundred sixty-eight thousand, three hundred eighty-nine".