13856539 has 2 divisors, whose sum is σ = 13856540. Its totient is φ = 13856538.

The previous prime is 13856527. The next prime is 13856593. The reversal of 13856539 is 93565831.

Together with next prime (13856593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13856539 - 2⁹ = 13856027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13856509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928269 + 6928270.

It is an arithmetic number, because the mean of its divisors is an integer number (6928270).

Almost surely, 2^13856539 is an apocalyptic number.

13856539 is a deficient number, since it is larger than the sum of its proper divisors (1).

13856539 is an equidigital number, since it uses as much as digits as its factorization.

13856539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 13856539 is about 3722.4372392292. The cubic root of 13856539 is about 240.1881568471.

The spelling of 13856539 in words is "thirteen million, eight hundred fifty-six thousand, five hundred thirty-nine".