13556089 has 4 divisors (see below), whose sum is σ = 14353524. Its totient is φ = 12758656.

The previous prime is 13556077. The next prime is 13556093. The reversal of 13556089 is 98065531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 3367225 = 3192^2 + 1835^2 .

It is a cyclic number.

It is not a de Polignac number, because 13556089 - 2⁵ = 13556057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13556029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398692 + ... + 398725.

It is an arithmetic number, because the mean of its divisors is an integer number (3588381).

Almost surely, 2^13556089 is an apocalyptic number.

It is an amenable number.

13556089 is a deficient number, since it is larger than the sum of its proper divisors (797435).

13556089 is an equidigital number, since it uses as much as digits as its factorization.

13556089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797434.

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

The square root of 13556089 is about 3681.8594487025. The cubic root of 13556089 is about 238.4394641457.

The spelling of 13556089 in words is "thirteen million, five hundred fifty-six thousand, eighty-nine".