13115239 has 2 divisors, whose sum is σ = 13115240. Its totient is φ = 13115238.

The previous prime is 13115233. The next prime is 13115243. The reversal of 13115239 is 93251131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13115239 - 2³ = 13115231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13115231) 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 as a sum of consecutive naturals, namely, 6557619 + 6557620.

It is an arithmetic number, because the mean of its divisors is an integer number (6557620).

Almost surely, 2^13115239 is an apocalyptic number.

13115239 is a deficient number, since it is larger than the sum of its proper divisors (1).

13115239 is an equidigital number, since it uses as much as digits as its factorization.

13115239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 25.

The square root of 13115239 is about 3621.4967900027. The cubic root of 13115239 is about 235.8262090714.

The spelling of 13115239 in words is "thirteen million, one hundred fifteen thousand, two hundred thirty-nine".