13438689 has 8 divisors (see below), whose sum is σ = 19547232. Its totient is φ = 8144640.

The previous prime is 13438679. The next prime is 13438697. The reversal of 13438689 is 98683431.

It is a happy number.

13438689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13438689 - 2⁴ = 13438673 is a prime.

It is a super-3 number, since 3×13438689³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13438689.

It is not an unprimeable number, because it can be changed into a prime (13438609) 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, 203584 + ... + 203649.

It is an arithmetic number, because the mean of its divisors is an integer number (2443404).

Almost surely, 2^13438689 is an apocalyptic number.

It is an amenable number.

13438689 is a deficient number, since it is larger than the sum of its proper divisors (6108543).

13438689 is a wasteful number, since it uses less digits than its factorization.

13438689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407247.

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

The square root of 13438689 is about 3665.8817493203. The cubic root of 13438689 is about 237.7491472226.

The spelling of 13438689 in words is "thirteen million, four hundred thirty-eight thousand, six hundred eighty-nine".