13891539 has 8 divisors (see below), whose sum is σ = 19022800. Its totient is φ = 9010656.

The previous prime is 13891531. The next prime is 13891541. The reversal of 13891539 is 93519831.

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

It is not a de Polignac number, because 13891539 - 2³ = 13891531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13891497 and 13891506.

It is not an unprimeable number, because it can be changed into a prime (13891531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62464 + ... + 62685.

It is an arithmetic number, because the mean of its divisors is an integer number (2377850).

Almost surely, 2^13891539 is an apocalyptic number.

13891539 is a deficient number, since it is larger than the sum of its proper divisors (5131261).

13891539 is a wasteful number, since it uses less digits than its factorization.

13891539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125189.

The product of its digits is 29160, while the sum is 39.

The square root of 13891539 is about 3727.1354952564. The cubic root of 13891539 is about 240.3902158987.

The spelling of 13891539 in words is "thirteen million, eight hundred ninety-one thousand, five hundred thirty-nine".