135789 has 4 divisors (see below), whose sum is σ = 181056. Its totient is φ = 90524.

The previous prime is 135787. The next prime is 135799. The reversal of 135789 is 987531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 987531 = 3 ⋅329177.

It is a cyclic number.

It is not a de Polignac number, because 135789 - 2¹ = 135787 is a prime.

It is a D-number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135781) 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, 22629 + ... + 22634.

It is an arithmetic number, because the mean of its divisors is an integer number (45264).

2¹³⁵⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

135789 is a deficient number, since it is larger than the sum of its proper divisors (45267).

135789 is an equidigital number, since it uses as much as digits as its factorization.

135789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45266.

The product of its digits is 7560, while the sum is 33.

The square root of 135789 is about 368.4955902043. The cubic root of 135789 is about 51.3990229290.

It can be divided in two parts, 13 and 5789, that multiplied together give a palindrome (75257).

The spelling of 135789 in words is "one hundred thirty-five thousand, seven hundred eighty-nine".