243012239 has 2 divisors, whose sum is σ = 243012240. Its totient is φ = 243012238.

The previous prime is 243012191. The next prime is 243012241. The reversal of 243012239 is 932210342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243012239 - 2¹⁶ = 242946703 is a prime.

Together with 243012241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243012269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121506119 + 121506120.

It is an arithmetic number, because the mean of its divisors is an integer number (121506120).

Almost surely, 2^243012239 is an apocalyptic number.

243012239 is a deficient number, since it is larger than the sum of its proper divisors (1).

243012239 is an equidigital number, since it uses as much as digits as its factorization.

243012239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 243012239 is about 15588.8498292850. The cubic root of 243012239 is about 624.0356233429.

The spelling of 243012239 in words is "two hundred forty-three million, twelve thousand, two hundred thirty-nine".