13688369 has 4 divisors (see below), whose sum is σ = 13696500. Its totient is φ = 13680240.

The previous prime is 13688357. The next prime is 13688371. The reversal of 13688369 is 96388631.

13688369 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 87025 + 13601344 = 295^2 + 3688^2 .

It is a cyclic number.

It is not a de Polignac number, because 13688369 - 2²⁰ = 12639793 is a prime.

It is a super-2 number, since 2×13688369² = 374742891760322, which contains 22 as substring.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 494 + ... + 5255.

It is an arithmetic number, because the mean of its divisors is an integer number (3424125).

Almost surely, 2^13688369 is an apocalyptic number.

It is an amenable number.

13688369 is a deficient number, since it is larger than the sum of its proper divisors (8131).

13688369 is an equidigital number, since it uses as much as digits as its factorization.

13688369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

The product of its digits is 186624, while the sum is 44.

The square root of 13688369 is about 3699.7795880295. The cubic root of 13688369 is about 239.2125173351.

The spelling of 13688369 in words is "thirteen million, six hundred eighty-eight thousand, three hundred sixty-nine".