135607639 has 2 divisors, whose sum is σ = 135607640. Its totient is φ = 135607638.

The previous prime is 135607573. The next prime is 135607673. The reversal of 135607639 is 936706531.

It is a strong prime.

It is an emirp because it is prime and its reverse (936706531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135607639 - 2⁹ = 135607127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135607699) 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, 67803819 + 67803820.

It is an arithmetic number, because the mean of its divisors is an integer number (67803820).

Almost surely, 2^135607639 is an apocalyptic number.

135607639 is a deficient number, since it is larger than the sum of its proper divisors (1).

135607639 is an equidigital number, since it uses as much as digits as its factorization.

135607639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 135607639 is about 11645.0692999226. The cubic root of 135607639 is about 513.7612973601.

The spelling of 135607639 in words is "one hundred thirty-five million, six hundred seven thousand, six hundred thirty-nine".