13688389 has 8 divisors (see below), whose sum is σ = 16081632. Its totient is φ = 11486640.

The previous prime is 13688371. The next prime is 13688393. The reversal of 13688389 is 98388631.

13688389 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 13688389 - 2⁵ = 13688357 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 (13688399) 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, 47719 + ... + 48004.

It is an arithmetic number, because the mean of its divisors is an integer number (2010204).

Almost surely, 2^13688389 is an apocalyptic number.

It is an amenable number.

13688389 is a deficient number, since it is larger than the sum of its proper divisors (2393243).

13688389 is a wasteful number, since it uses less digits than its factorization.

13688389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95747.

The product of its digits is 248832, while the sum is 46.

The square root of 13688389 is about 3699.7822908923. The cubic root of 13688389 is about 239.2126338390.

The spelling of 13688389 in words is "thirteen million, six hundred eighty-eight thousand, three hundred eighty-nine".