135809803 has 4 divisors (see below), whose sum is σ = 135849168. Its totient is φ = 135770440.

The previous prime is 135809801. The next prime is 135809879. The reversal of 135809803 is 308908531.

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

It is a cyclic number.

It is not a de Polignac number, because 135809803 - 2¹ = 135809801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135809801) 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, 13951 + ... + 21592.

It is an arithmetic number, because the mean of its divisors is an integer number (33962292).

Almost surely, 2^135809803 is an apocalyptic number.

135809803 is a deficient number, since it is larger than the sum of its proper divisors (39365).

135809803 is an equidigital number, since it uses as much as digits as its factorization.

135809803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39364.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 135809803 is about 11653.7463075185. The cubic root of 135809803 is about 514.0164758758.

The spelling of 135809803 in words is "one hundred thirty-five million, eight hundred nine thousand, eight hundred three".