243042189 has 8 divisors (see below), whose sum is σ = 348983712. Its totient is φ = 149564400.

The previous prime is 243042187. The next prime is 243042203. The reversal of 243042189 is 981240342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243042189 - 2¹ = 243042187 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243042187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3115887 + ... + 3115964.

It is an arithmetic number, because the mean of its divisors is an integer number (43622964).

Almost surely, 2^243042189 is an apocalyptic number.

It is an amenable number.

243042189 is a deficient number, since it is larger than the sum of its proper divisors (105941523).

243042189 is a wasteful number, since it uses less digits than its factorization.

243042189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6231867.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 243042189 is about 15589.8104221956. The cubic root of 243042189 is about 624.0612586762.

The spelling of 243042189 in words is "two hundred forty-three million, forty-two thousand, one hundred eighty-nine".