13009439 has 2 divisors, whose sum is σ = 13009440. Its totient is φ = 13009438.

The previous prime is 13009391. The next prime is 13009453. The reversal of 13009439 is 93490031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13009439 - 2²⁰ = 11960863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13009489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6504719 + 6504720.

It is an arithmetic number, because the mean of its divisors is an integer number (6504720).

Almost surely, 2^13009439 is an apocalyptic number.

13009439 is a deficient number, since it is larger than the sum of its proper divisors (1).

13009439 is an equidigital number, since it uses as much as digits as its factorization.

13009439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 13009439 is about 3606.8599917380. The cubic root of 13009439 is about 235.1903633329.

The spelling of 13009439 in words is "thirteen million, nine thousand, four hundred thirty-nine".