13875139 has 2 divisors, whose sum is σ = 13875140. Its totient is φ = 13875138.

The previous prime is 13875133. The next prime is 13875151. The reversal of 13875139 is 93157831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13875139 - 2¹¹ = 13873091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13875098 and 13875107.

It is not a weakly prime, because it can be changed into another prime (13875133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6937569 + 6937570.

It is an arithmetic number, because the mean of its divisors is an integer number (6937570).

Almost surely, 2^13875139 is an apocalyptic number.

13875139 is a deficient number, since it is larger than the sum of its proper divisors (1).

13875139 is an equidigital number, since it uses as much as digits as its factorization.

13875139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 13875139 is about 3724.9347645294. The cubic root of 13875139 is about 240.2955791084.

The spelling of 13875139 in words is "thirteen million, eight hundred seventy-five thousand, one hundred thirty-nine".