13444989 has 8 divisors (see below), whose sum is σ = 18870240. Its totient is φ = 8491536.

The previous prime is 13444969. The next prime is 13444997. The reversal of 13444989 is 98944431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13444989 - 2⁸ = 13444733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13444989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117882 + ... + 117995.

It is an arithmetic number, because the mean of its divisors is an integer number (2358780).

Almost surely, 2^13444989 is an apocalyptic number.

13444989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13444989 is a deficient number, since it is larger than the sum of its proper divisors (5425251).

13444989 is a wasteful number, since it uses less digits than its factorization.

13444989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235899.

The product of its digits is 124416, while the sum is 42.

The square root of 13444989 is about 3666.7409234905. The cubic root of 13444989 is about 237.7862933467.

The spelling of 13444989 in words is "thirteen million, four hundred forty-four thousand, nine hundred eighty-nine".