13944239 has 4 divisors (see below), whose sum is σ = 13954056. Its totient is φ = 13934424.

The previous prime is 13944221. The next prime is 13944257. The reversal of 13944239 is 93244931.

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 is an interprime number because it is at equal distance from previous prime (13944221) and next prime (13944257).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13944239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13944199 and 13944208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13944209) 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, 2324 + ... + 5769.

It is an arithmetic number, because the mean of its divisors is an integer number (3488514).

Almost surely, 2^13944239 is an apocalyptic number.

13944239 is a deficient number, since it is larger than the sum of its proper divisors (9817).

13944239 is an equidigital number, since it uses as much as digits as its factorization.

13944239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816.

The product of its digits is 23328, while the sum is 35.

The square root of 13944239 is about 3734.1985753305. The cubic root of 13944239 is about 240.6938198386.

The spelling of 13944239 in words is "thirteen million, nine hundred forty-four thousand, two hundred thirty-nine".