13456889 has 4 divisors (see below), whose sum is σ = 13608180. Its totient is φ = 13305600.

The previous prime is 13456879. The next prime is 13456901. The reversal of 13456889 is 98865431.

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 2301289 + 11155600 = 1517^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 13456889 - 2¹⁶ = 13391353 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13456819) 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, 75512 + ... + 75689.

It is an arithmetic number, because the mean of its divisors is an integer number (3402045).

Almost surely, 2^13456889 is an apocalyptic number.

It is an amenable number.

13456889 is a deficient number, since it is larger than the sum of its proper divisors (151291).

13456889 is an equidigital number, since it uses as much as digits as its factorization.

13456889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151290.

The product of its digits is 207360, while the sum is 44.

The square root of 13456889 is about 3668.3632590026. The cubic root of 13456889 is about 237.8564266003.

The spelling of 13456889 in words is "thirteen million, four hundred fifty-six thousand, eight hundred eighty-nine".