13444289 has 4 divisors (see below), whose sum is σ = 13487556. Its totient is φ = 13401024.

The previous prime is 13444279. The next prime is 13444307. The reversal of 13444289 is 98244431.

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 339889 + 13104400 = 583^2 + 3620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13444289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13444279) 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, 21164 + ... + 21789.

It is an arithmetic number, because the mean of its divisors is an integer number (3371889).

Almost surely, 2^13444289 is an apocalyptic number.

It is an amenable number.

13444289 is a deficient number, since it is larger than the sum of its proper divisors (43267).

13444289 is an equidigital number, since it uses as much as digits as its factorization.

13444289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43266.

The product of its digits is 27648, while the sum is 35.

The square root of 13444289 is about 3666.6454696357. The cubic root of 13444289 is about 237.7821665727.

The spelling of 13444289 in words is "thirteen million, four hundred forty-four thousand, two hundred eighty-nine".