135144643 has 4 divisors (see below), whose sum is σ = 135475480. Its totient is φ = 134813808.

The previous prime is 135144623. The next prime is 135144649. The reversal of 135144643 is 346441531.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135144643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135144649) 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, 164805 + ... + 165622.

It is an arithmetic number, because the mean of its divisors is an integer number (33868870).

Almost surely, 2^135144643 is an apocalyptic number.

135144643 is a deficient number, since it is larger than the sum of its proper divisors (330837).

135144643 is an equidigital number, since it uses as much as digits as its factorization.

135144643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330836.

The product of its digits is 17280, while the sum is 31.

The square root of 135144643 is about 11625.1728159198. The cubic root of 135144643 is about 513.1759304986.

The spelling of 135144643 in words is "one hundred thirty-five million, one hundred forty-four thousand, six hundred forty-three".