135579439 has 2 divisors, whose sum is σ = 135579440. Its totient is φ = 135579438.

The previous prime is 135579413. The next prime is 135579467. The reversal of 135579439 is 934975531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135579439 - 2²¹ = 133482287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135576439) 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, 67789719 + 67789720.

It is an arithmetic number, because the mean of its divisors is an integer number (67789720).

Almost surely, 2^135579439 is an apocalyptic number.

135579439 is a deficient number, since it is larger than the sum of its proper divisors (1).

135579439 is an equidigital number, since it uses as much as digits as its factorization.

135579439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 46.

The square root of 135579439 is about 11643.8584240792. The cubic root of 135579439 is about 513.7256821763.

The spelling of 135579439 in words is "one hundred thirty-five million, five hundred seventy-nine thousand, four hundred thirty-nine".