13889539 has 4 divisors (see below), whose sum is σ = 14493456. Its totient is φ = 13285624.

The previous prime is 13889531. The next prime is 13889567. The reversal of 13889539 is 93598831.

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 13889539 - 2³ = 13889531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13889531) 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, 301924 + ... + 301969.

It is an arithmetic number, because the mean of its divisors is an integer number (3623364).

Almost surely, 2^13889539 is an apocalyptic number.

13889539 is a deficient number, since it is larger than the sum of its proper divisors (603917).

13889539 is an equidigital number, since it uses as much as digits as its factorization.

13889539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603916.

The product of its digits is 233280, while the sum is 46.

The square root of 13889539 is about 3726.8671830372. The cubic root of 13889539 is about 240.3786788159.

The spelling of 13889539 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred thirty-nine".