13565089 has 2 divisors, whose sum is σ = 13565090. Its totient is φ = 13565088.

The previous prime is 13565059. The next prime is 13565129. The reversal of 13565089 is 98056531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11696400 + 1868689 = 3420^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 13565089 - 2⁷ = 13564961 is a prime.

It is not a weakly prime, because it can be changed into another prime (13565059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782544 + 6782545.

It is an arithmetic number, because the mean of its divisors is an integer number (6782545).

Almost surely, 2^13565089 is an apocalyptic number.

It is an amenable number.

13565089 is a deficient number, since it is larger than the sum of its proper divisors (1).

13565089 is an equidigital number, since it uses as much as digits as its factorization.

13565089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 13565089 is about 3683.0814544346. The cubic root of 13565089 is about 238.4922197856.

The spelling of 13565089 in words is "thirteen million, five hundred sixty-five thousand, eighty-nine".