135803 has 4 divisors (see below), whose sum is σ = 136920. Its totient is φ = 134688.

The previous prime is 135799. The next prime is 135829. The reversal of 135803 is 308531.

135803 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: 308531 = 29 ⋅10639.

It is a cyclic number.

It is not a de Polignac number, because 135803 - 2² = 135799 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 135803.

It is not an unprimeable number, because it can be changed into a prime (135893) 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, 350 + ... + 627.

It is an arithmetic number, because the mean of its divisors is an integer number (34230).

2¹³⁵⁸⁰³ is an apocalyptic number.

135803 is a deficient number, since it is larger than the sum of its proper divisors (1117).

135803 is an equidigital number, since it uses as much as digits as its factorization.

135803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 135803 is about 368.5145858714. The cubic root of 135803 is about 51.4007893009.

The spelling of 135803 in words is "one hundred thirty-five thousand, eight hundred three".