135218833 has 4 divisors (see below), whose sum is σ = 143172900. Its totient is φ = 127264768.

The previous prime is 135218827. The next prime is 135218887. The reversal of 135218833 is 338812531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 338812531 = 839 ⋅403829.

It can be written as a sum of positive squares in 2 ways, for example, as 73564929 + 61653904 = 8577^2 + 7852^2 .

It is a cyclic number.

It is not a de Polignac number, because 135218833 - 2¹³ = 135210641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135218803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3977008 + ... + 3977041.

It is an arithmetic number, because the mean of its divisors is an integer number (35793225).

Almost surely, 2^135218833 is an apocalyptic number.

It is an amenable number.

135218833 is a deficient number, since it is larger than the sum of its proper divisors (7954067).

135218833 is an equidigital number, since it uses as much as digits as its factorization.

135218833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954066.

The product of its digits is 17280, while the sum is 34.

The square root of 135218833 is about 11628.3632984182. The cubic root of 135218833 is about 513.2698189347.

The spelling of 135218833 in words is "one hundred thirty-five million, two hundred eighteen thousand, eight hundred thirty-three".