135091439 has 16 divisors (see below), whose sum is σ = 157439040. Its totient is φ = 113529600.

The previous prime is 135091399. The next prime is 135091441. The reversal of 135091439 is 934190531.

135091439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 135091439 - 2⁸ = 135091183 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135091399 and 135091408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135091039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76187 + ... + 77939.

It is an arithmetic number, because the mean of its divisors is an integer number (9839940).

Almost surely, 2^135091439 is an apocalyptic number.

135091439 is a deficient number, since it is larger than the sum of its proper divisors (22347601).

135091439 is a wasteful number, since it uses less digits than its factorization.

135091439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 135091439 is about 11622.8842805906. The cubic root of 135091439 is about 513.1085789674.

The spelling of 135091439 in words is "one hundred thirty-five million, ninety-one thousand, four hundred thirty-nine".