243109090109 has 8 divisors (see below), whose sum is σ = 244038778368. Its totient is φ = 242180297280.

The previous prime is 243109090093. The next prime is 243109090129. The reversal of 243109090109 is 901090901342.

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

It is a cyclic number.

It is not a de Polignac number, because 243109090109 - 2⁴ = 243109090093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243109090129) 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, 322724 + ... + 768354.

It is an arithmetic number, because the mean of its divisors is an integer number (30504847296).

Almost surely, 2^243109090109 is an apocalyptic number.

It is an amenable number.

243109090109 is a deficient number, since it is larger than the sum of its proper divisors (929688259).

243109090109 is a wasteful number, since it uses less digits than its factorization.

243109090109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447715.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 243109090109 in words is "two hundred forty-three billion, one hundred nine million, ninety thousand, one hundred nine".