13688943 has 4 divisors (see below), whose sum is σ = 18251928. Its totient is φ = 9125960.

The previous prime is 13688929. The next prime is 13688951. The reversal of 13688943 is 34988631.

It is a happy number.

13688943 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 an emirpimes, since its reverse is a distinct semiprime: 34988631 = 3 ⋅11662877.

It is a cyclic number.

It is not a de Polignac number, because 13688943 - 2⁶ = 13688879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13688895 and 13688904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13688953) 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, 2281488 + ... + 2281493.

It is an arithmetic number, because the mean of its divisors is an integer number (4562982).

Almost surely, 2^13688943 is an apocalyptic number.

13688943 is a deficient number, since it is larger than the sum of its proper divisors (4562985).

13688943 is an equidigital number, since it uses as much as digits as its factorization.

13688943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562984.

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

The square root of 13688943 is about 3699.8571594049. The cubic root of 13688943 is about 239.2158609539.

The spelling of 13688943 in words is "thirteen million, six hundred eighty-eight thousand, nine hundred forty-three".