13839 has 8 divisors (see below), whose sum is σ = 21120. Its totient is φ = 7896.

The previous prime is 13831. The next prime is 13841. The reversal of 13839 is 93831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13839 - 2³ = 13831 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309 + ... + 350.

It is an arithmetic number, because the mean of its divisors is an integer number (2640).

2¹³⁸³⁹ is an apocalyptic number.

13839 is a deficient number, since it is larger than the sum of its proper divisors (7281).

13839 is an equidigital number, since it uses as much as digits as its factorization.

13839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its digits is 648, while the sum is 24.

The square root of 13839 is about 117.6392791545. The cubic root of 13839 is about 24.0086774178.

The spelling of 13839 in words is "thirteen thousand, eight hundred thirty-nine".