13889443 has 4 divisors (see below), whose sum is σ = 13911688. Its totient is φ = 13867200.

The previous prime is 13889441. The next prime is 13889453. The reversal of 13889443 is 34498831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13889443 - 2¹ = 13889441 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 13889396 and 13889405.

It is not an unprimeable number, because it can be changed into a prime (13889441) 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, 10158 + ... + 11443.

It is an arithmetic number, because the mean of its divisors is an integer number (3477922).

Almost surely, 2^13889443 is an apocalyptic number.

13889443 is a deficient number, since it is larger than the sum of its proper divisors (22245).

13889443 is an equidigital number, since it uses as much as digits as its factorization.

13889443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22244.

The product of its digits is 82944, while the sum is 40.

The square root of 13889443 is about 3726.8543035649. The cubic root of 13889443 is about 240.3781250081.

The spelling of 13889443 in words is "thirteen million, eight hundred eighty-nine thousand, four hundred forty-three".