243124439 has 2 divisors, whose sum is σ = 243124440. Its totient is φ = 243124438.

The previous prime is 243124417. The next prime is 243124459. The reversal of 243124439 is 934421342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243124439 - 2⁸ = 243124183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243124459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121562219 + 121562220.

It is an arithmetic number, because the mean of its divisors is an integer number (121562220).

Almost surely, 2^243124439 is an apocalyptic number.

243124439 is a deficient number, since it is larger than the sum of its proper divisors (1).

243124439 is an equidigital number, since it uses as much as digits as its factorization.

243124439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The square root of 243124439 is about 15592.4481400452. The cubic root of 243124439 is about 624.1316487177.

The spelling of 243124439 in words is "two hundred forty-three million, one hundred twenty-four thousand, four hundred thirty-nine".