13255989 has 16 divisors (see below), whose sum is σ = 18133632. Its totient is φ = 8610368.

The previous prime is 13255951. The next prime is 13255999. The reversal of 13255989 is 98955231.

It is a cyclic number.

It is not a de Polignac number, because 13255989 - 2⁷ = 13255861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13255989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13255999) 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 in 15 ways as a sum of consecutive naturals, for example, 41659 + ... + 41975.

It is an arithmetic number, because the mean of its divisors is an integer number (1133352).

Almost surely, 2^13255989 is an apocalyptic number.

It is an amenable number.

13255989 is a deficient number, since it is larger than the sum of its proper divisors (4877643).

13255989 is a wasteful number, since it uses less digits than its factorization.

13255989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its digits is 97200, while the sum is 42.

The square root of 13255989 is about 3640.8775041190. The cubic root of 13255989 is about 236.6668216182. Note that the first 3 decimals are identical.

The spelling of 13255989 in words is "thirteen million, two hundred fifty-five thousand, nine hundred eighty-nine".