243204347 has 2 divisors, whose sum is σ = 243204348. Its totient is φ = 243204346.

The previous prime is 243204341. The next prime is 243204349. The reversal of 243204347 is 743402342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243204347 is a prime.

Together with 243204349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243204341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121602173 + 121602174.

It is an arithmetic number, because the mean of its divisors is an integer number (121602174).

Almost surely, 2^243204347 is an apocalyptic number.

243204347 is a deficient number, since it is larger than the sum of its proper divisors (1).

243204347 is an equidigital number, since it uses as much as digits as its factorization.

243204347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 243204347 is about 15595.0103238183. The cubic root of 243204347 is about 624.2000192595.

Adding to 243204347 its reverse (743402342), we get a palindrome (986606689).

The spelling of 243204347 in words is "two hundred forty-three million, two hundred four thousand, three hundred forty-seven".