13938239 has 4 divisors (see below), whose sum is σ = 15929424. Its totient is φ = 11947056.

The previous prime is 13938227. The next prime is 13938247. The reversal of 13938239 is 93283931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93283931 = 13 ⋅7175687.

It is a cyclic number.

It is not a de Polignac number, because 13938239 - 2²⁰ = 12889663 is a prime.

It is a super-2 number, since 2×13938239² = 388549012842242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13938209) 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, 995582 + ... + 995595.

It is an arithmetic number, because the mean of its divisors is an integer number (3982356).

Almost surely, 2^13938239 is an apocalyptic number.

13938239 is a deficient number, since it is larger than the sum of its proper divisors (1991185).

13938239 is an equidigital number, since it uses as much as digits as its factorization.

13938239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991184.

The product of its digits is 34992, while the sum is 38.

The square root of 13938239 is about 3733.3951036557. The cubic root of 13938239 is about 240.6592925545.

The spelling of 13938239 in words is "thirteen million, nine hundred thirty-eight thousand, two hundred thirty-nine".