13894239 has 4 divisors (see below), whose sum is σ = 18525656. Its totient is φ = 9262824.

The previous prime is 13894229. The next prime is 13894247. The reversal of 13894239 is 93249831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93249831 = 3 ⋅31083277.

It is not a de Polignac number, because 13894239 - 2⁵ = 13894207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13894197 and 13894206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13894229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315704 + ... + 2315709.

It is an arithmetic number, because the mean of its divisors is an integer number (4631414).

Almost surely, 2^13894239 is an apocalyptic number.

13894239 is a deficient number, since it is larger than the sum of its proper divisors (4631417).

13894239 is an equidigital number, since it uses as much as digits as its factorization.

13894239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4631416.

The product of its digits is 46656, while the sum is 39.

The square root of 13894239 is about 3727.4976861160. The cubic root of 13894239 is about 240.4057892041.

The spelling of 13894239 in words is "thirteen million, eight hundred ninety-four thousand, two hundred thirty-nine".