243168433973 has 2 divisors, whose sum is σ = 243168433974. Its totient is φ = 243168433972.

The previous prime is 243168433967. The next prime is 243168433987. The reversal of 243168433973 is 379334861342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180864779524 + 62303654449 = 425282^2 + 249607^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243168433973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243168433273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121584216986 + 121584216987.

It is an arithmetic number, because the mean of its divisors is an integer number (121584216987).

Almost surely, 2^243168433973 is an apocalyptic number.

It is an amenable number.

243168433973 is a deficient number, since it is larger than the sum of its proper divisors (1).

243168433973 is an equidigital number, since it uses as much as digits as its factorization.

243168433973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 53.

The spelling of 243168433973 in words is "two hundred forty-three billion, one hundred sixty-eight million, four hundred thirty-three thousand, nine hundred seventy-three".