13444391 has 4 divisors (see below), whose sum is σ = 13469784. Its totient is φ = 13419000.

The previous prime is 13444373. The next prime is 13444469. The reversal of 13444391 is 19344431.

13444391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13444391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444591) 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, 11885 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (3367446).

Almost surely, 2^13444391 is an apocalyptic number.

13444391 is a deficient number, since it is larger than the sum of its proper divisors (25393).

13444391 is an equidigital number, since it uses as much as digits as its factorization.

13444391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25392.

The product of its digits is 5184, while the sum is 29.

The square root of 13444391 is about 3666.6593787806. The cubic root of 13444391 is about 237.7827679116.

The spelling of 13444391 in words is "thirteen million, four hundred forty-four thousand, three hundred ninety-one".