135791 has 4 divisors (see below), whose sum is σ = 136584. Its totient is φ = 135000.

The previous prime is 135787. The next prime is 135799. The reversal of 135791 is 197531.

135791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 197531 = 53 ⋅3727.

It is a cyclic number.

It is not a de Polignac number, because 135791 - 2² = 135787 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 135791.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135791.

It is not an unprimeable number, because it can be changed into a prime (135799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 521.

It is an arithmetic number, because the mean of its divisors is an integer number (34146).

2¹³⁵⁷⁹¹ is an apocalyptic number.

135791 is a deficient number, since it is larger than the sum of its proper divisors (793).

135791 is an equidigital number, since it uses as much as digits as its factorization.

135791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its digits is 945, while the sum is 26.

The square root of 135791 is about 368.4983039310. The cubic root of 135791 is about 51.3992752753.

The spelling of 135791 in words is "one hundred thirty-five thousand, seven hundred ninety-one".