243349879 has 4 divisors (see below), whose sum is σ = 248527584. Its totient is φ = 238172176.

The previous prime is 243349859. The next prime is 243349889. The reversal of 243349879 is 978943342.

It is a happy number.

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 243349879 - 2⁷ = 243349751 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243349819) 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, 2588782 + ... + 2588875.

It is an arithmetic number, because the mean of its divisors is an integer number (62131896).

Almost surely, 2^243349879 is an apocalyptic number.

243349879 is a deficient number, since it is larger than the sum of its proper divisors (5177705).

243349879 is an equidigital number, since it uses as much as digits as its factorization.

243349879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177704.

The product of its digits is 1306368, while the sum is 49.

The square root of 243349879 is about 15599.6756056015. The cubic root of 243349879 is about 624.3245002632.

The spelling of 243349879 in words is "two hundred forty-three million, three hundred forty-nine thousand, eight hundred seventy-nine".