243223424993 has 2 divisors, whose sum is σ = 243223424994. Its totient is φ = 243223424992.

The previous prime is 243223424971. The next prime is 243223425017. The reversal of 243223424993 is 399424322342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167880311824 + 75343113169 = 409732^2 + 274487^2 .

It is a cyclic number.

It is not a de Polignac number, because 243223424993 - 2²² = 243219230689 is a prime.

It is not a weakly prime, because it can be changed into another prime (243223424963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121611712496 + 121611712497.

It is an arithmetic number, because the mean of its divisors is an integer number (121611712497).

Almost surely, 2^243223424993 is an apocalyptic number.

It is an amenable number.

243223424993 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223424993 is an equidigital number, since it uses as much as digits as its factorization.

243223424993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 47.

The spelling of 243223424993 in words is "two hundred forty-three billion, two hundred twenty-three million, four hundred twenty-four thousand, nine hundred ninety-three".