135769 has 4 divisors (see below), whose sum is σ = 141696. Its totient is φ = 129844.

The previous prime is 135757. The next prime is 135781. The reversal of 135769 is 967531.

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: 967531 = 83 ⋅11657.

It is an interprime number because it is at equal distance from previous prime (135757) and next prime (135781).

It is a cyclic number.

It is not a de Polignac number, because 135769 - 2⁹ = 135257 is a prime.

It is a super-2 number, since 2×135769² = 36866442722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135769.

It is not an unprimeable number, because it can be changed into a prime (135719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2929 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (35424).

2¹³⁵⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

135769 is a deficient number, since it is larger than the sum of its proper divisors (5927).

135769 is an equidigital number, since it uses as much as digits as its factorization.

135769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926.

The product of its digits is 5670, while the sum is 31.

The square root of 135769 is about 368.4684518381. The cubic root of 135769 is about 51.3964993301.

The spelling of 135769 in words is "one hundred thirty-five thousand, seven hundred sixty-nine".