13889523 has 4 divisors (see below), whose sum is σ = 18519368. Its totient is φ = 9259680.

The previous prime is 13889509. The next prime is 13889531. The reversal of 13889523 is 32598831.

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

It is not a de Polignac number, because 13889523 - 2⁴ = 13889507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13889503) 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, 2314918 + ... + 2314923.

It is an arithmetic number, because the mean of its divisors is an integer number (4629842).

Almost surely, 2^13889523 is an apocalyptic number.

13889523 is a deficient number, since it is larger than the sum of its proper divisors (4629845).

13889523 is an equidigital number, since it uses as much as digits as its factorization.

13889523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629844.

The product of its digits is 51840, while the sum is 39.

The square root of 13889523 is about 3726.8650364616. The cubic root of 13889523 is about 240.3785865148.

The spelling of 13889523 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred twenty-three".