243342317 has 2 divisors, whose sum is σ = 243342318. Its totient is φ = 243342316.

The previous prime is 243342299. The next prime is 243342331. The reversal of 243342317 is 713243342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150528361 + 92813956 = 12269^2 + 9634^2 .

It is a cyclic number.

It is not a de Polignac number, because 243342317 - 2⁸ = 243342061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243342317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243342397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121671158 + 121671159.

It is an arithmetic number, because the mean of its divisors is an integer number (121671159).

Almost surely, 2^243342317 is an apocalyptic number.

It is an amenable number.

243342317 is a deficient number, since it is larger than the sum of its proper divisors (1).

243342317 is an equidigital number, since it uses as much as digits as its factorization.

243342317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 29.

The square root of 243342317 is about 15599.4332268836. The cubic root of 243342317 is about 624.3180333183.

Adding to 243342317 its reverse (713243342), we get a palindrome (956585659).

The spelling of 243342317 in words is "two hundred forty-three million, three hundred forty-two thousand, three hundred seventeen".