243042797 has 2 divisors, whose sum is σ = 243042798. Its totient is φ = 243042796.

The previous prime is 243042791. The next prime is 243042809. The reversal of 243042797 is 797240342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242456041 + 586756 = 15571^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 243042797 - 2²⁴ = 226265581 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243042797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243042791) 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, 121521398 + 121521399.

It is an arithmetic number, because the mean of its divisors is an integer number (121521399).

Almost surely, 2^243042797 is an apocalyptic number.

It is an amenable number.

243042797 is a deficient number, since it is larger than the sum of its proper divisors (1).

243042797 is an equidigital number, since it uses as much as digits as its factorization.

243042797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 243042797 is about 15589.8299220999. The cubic root of 243042797 is about 624.0617790644.

The spelling of 243042797 in words is "two hundred forty-three million, forty-two thousand, seven hundred ninety-seven".