135305239 has 2 divisors, whose sum is σ = 135305240. Its totient is φ = 135305238.

The previous prime is 135305201. The next prime is 135305257. The reversal of 135305239 is 932503531.

It is a strong prime.

It is an emirp because it is prime and its reverse (932503531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135305239 - 2⁹ = 135304727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135305239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135305299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67652619 + 67652620.

It is an arithmetic number, because the mean of its divisors is an integer number (67652620).

Almost surely, 2^135305239 is an apocalyptic number.

135305239 is a deficient number, since it is larger than the sum of its proper divisors (1).

135305239 is an equidigital number, since it uses as much as digits as its factorization.

135305239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 135305239 is about 11632.0780172762. The cubic root of 135305239 is about 513.3791236022.

It can be divided in two parts, 13530 and 5239, that added together give a square (18769 = 137²).

The spelling of 135305239 in words is "one hundred thirty-five million, three hundred five thousand, two hundred thirty-nine".