243824117 has 4 divisors (see below), whose sum is σ = 250413996. Its totient is φ = 237234240.

The previous prime is 243824059. The next prime is 243824159. The reversal of 243824117 is 711428342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 206381956 + 37442161 = 14366^2 + 6119^2 .

It is a cyclic number.

It is not a de Polignac number, because 243824117 - 2²⁴ = 227046901 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 (243824197) 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, 3294884 + ... + 3294957.

It is an arithmetic number, because the mean of its divisors is an integer number (62603499).

Almost surely, 2^243824117 is an apocalyptic number.

It is an amenable number.

243824117 is a deficient number, since it is larger than the sum of its proper divisors (6589879).

243824117 is an equidigital number, since it uses as much as digits as its factorization.

243824117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6589878.

The product of its digits is 10752, while the sum is 32.

The square root of 243824117 is about 15614.8684592602. The cubic root of 243824117 is about 624.7297963742.

The spelling of 243824117 in words is "two hundred forty-three million, eight hundred twenty-four thousand, one hundred seventeen".