13689407 has 4 divisors (see below), whose sum is σ = 13710840. Its totient is φ = 13667976.

The previous prime is 13689397. The next prime is 13689433. The reversal of 13689407 is 70498631.

13689407 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 70498631 = 7 ⋅10071233.

It is a cyclic number.

It is not a de Polignac number, because 13689407 - 2⁶ = 13689343 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 (13689307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9728 + ... + 11045.

It is an arithmetic number, because the mean of its divisors is an integer number (3427710).

Almost surely, 2^13689407 is an apocalyptic number.

13689407 is a deficient number, since it is larger than the sum of its proper divisors (21433).

13689407 is an equidigital number, since it uses as much as digits as its factorization.

13689407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21432.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 13689407 is about 3699.9198639971. The cubic root of 13689407 is about 239.2185637412.

The spelling of 13689407 in words is "thirteen million, six hundred eighty-nine thousand, four hundred seven".