13839539 has 4 divisors (see below), whose sum is σ = 15816624. Its totient is φ = 11862456.

The previous prime is 13839523. The next prime is 13839557. The reversal of 13839539 is 93593831.

13839539 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13839539 - 2⁴ = 13839523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13839496 and 13839505.

It is not an unprimeable number, because it can be changed into a prime (13839569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988532 + ... + 988545.

It is an arithmetic number, because the mean of its divisors is an integer number (3954156).

Almost surely, 2^13839539 is an apocalyptic number.

13839539 is a deficient number, since it is larger than the sum of its proper divisors (1977085).

13839539 is an equidigital number, since it uses as much as digits as its factorization.

13839539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977084.

The product of its digits is 87480, while the sum is 41.

The square root of 13839539 is about 3720.1530882478. The cubic root of 13839539 is about 240.0898910959.

The spelling of 13839539 in words is "thirteen million, eight hundred thirty-nine thousand, five hundred thirty-nine".