135699 has 4 divisors (see below), whose sum is σ = 180936. Its totient is φ = 90464.

The previous prime is 135697. The next prime is 135701. The reversal of 135699 is 996531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (135697) and next prime (135701).

It is a cyclic number.

It is not a de Polignac number, because 135699 - 2¹ = 135697 is a prime.

It is a D-number.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (135697) 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, 22614 + ... + 22619.

It is an arithmetic number, because the mean of its divisors is an integer number (45234).

2¹³⁵⁶⁹⁹ is an apocalyptic number.

135699 is a deficient number, since it is larger than the sum of its proper divisors (45237).

135699 is an equidigital number, since it uses as much as digits as its factorization.

135699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45236.

The product of its digits is 7290, while the sum is 33.

The square root of 135699 is about 368.3734518122. The cubic root of 135699 is about 51.3876647816.

The spelling of 135699 in words is "one hundred thirty-five thousand, six hundred ninety-nine".