243823109 has 8 divisors (see below), whose sum is σ = 247123968. Its totient is φ = 240544080.

The previous prime is 243823103. The next prime is 243823133. The reversal of 243823109 is 901328342.

It is a happy number.

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 243823109 - 2⁸ = 243822853 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 (243823103) 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 7 ways as a sum of consecutive naturals, for example, 17684 + ... + 28290.

It is an arithmetic number, because the mean of its divisors is an integer number (30890496).

Almost surely, 2^243823109 is an apocalyptic number.

It is an amenable number.

243823109 is a deficient number, since it is larger than the sum of its proper divisors (3300859).

243823109 is a wasteful number, since it uses less digits than its factorization.

243823109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10915.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 243823109 is about 15614.8361822979. The cubic root of 243823109 is about 624.7289354688.

The spelling of 243823109 in words is "two hundred forty-three million, eight hundred twenty-three thousand, one hundred nine".