135236643 has 4 divisors (see below), whose sum is σ = 180315528. Its totient is φ = 90157760.

The previous prime is 135236641. The next prime is 135236659. The reversal of 135236643 is 346632531.

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 135236643 - 2¹ = 135236641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135236641) 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, 22539438 + ... + 22539443.

It is an arithmetic number, because the mean of its divisors is an integer number (45078882).

Almost surely, 2^135236643 is an apocalyptic number.

135236643 is a deficient number, since it is larger than the sum of its proper divisors (45078885).

135236643 is an equidigital number, since it uses as much as digits as its factorization.

135236643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45078884.

The product of its digits is 38880, while the sum is 33.

The square root of 135236643 is about 11629.1290731507. The cubic root of 135236643 is about 513.2923526157.

The spelling of 135236643 in words is "one hundred thirty-five million, two hundred thirty-six thousand, six hundred forty-three".