13135439 has 2 divisors, whose sum is σ = 13135440. Its totient is φ = 13135438.

The previous prime is 13135433. The next prime is 13135469. The reversal of 13135439 is 93453131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13135439 - 2¹² = 13131343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13135433) 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, 6567719 + 6567720.

It is an arithmetic number, because the mean of its divisors is an integer number (6567720).

Almost surely, 2^13135439 is an apocalyptic number.

13135439 is a deficient number, since it is larger than the sum of its proper divisors (1).

13135439 is an equidigital number, since it uses as much as digits as its factorization.

13135439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 13135439 is about 3624.2846190662. The cubic root of 13135439 is about 235.9472195958.

The spelling of 13135439 in words is "thirteen million, one hundred thirty-five thousand, four hundred thirty-nine".