13908539 has 4 divisors (see below), whose sum is σ = 14052024. Its totient is φ = 13765056.

The previous prime is 13908529. The next prime is 13908563. The reversal of 13908539 is 93580931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93580931 = 761 ⋅122971.

It is a cyclic number.

It is not a de Polignac number, because 13908539 - 2⁴ = 13908523 is a prime.

It is a super-2 number, since 2×13908539² = 386894914229042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13908529) 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, 71597 + ... + 71790.

It is an arithmetic number, because the mean of its divisors is an integer number (3513006).

Almost surely, 2^13908539 is an apocalyptic number.

13908539 is a deficient number, since it is larger than the sum of its proper divisors (143485).

13908539 is an equidigital number, since it uses as much as digits as its factorization.

13908539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143484.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 13908539 is about 3729.4153697329. The cubic root of 13908539 is about 240.4882364222.

The spelling of 13908539 in words is "thirteen million, nine hundred eight thousand, five hundred thirty-nine".