243404231093 has 2 divisors, whose sum is σ = 243404231094. Its totient is φ = 243404231092.

The previous prime is 243404231039. The next prime is 243404231107. The reversal of 243404231093 is 390132404342.

Together with previous prime (243404231039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240985755409 + 2418475684 = 490903^2 + 49178^2 .

It is a cyclic number.

It is not a de Polignac number, because 243404231093 - 2¹² = 243404226997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243404231023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121702115546 + 121702115547.

It is an arithmetic number, because the mean of its divisors is an integer number (121702115547).

Almost surely, 2^243404231093 is an apocalyptic number.

It is an amenable number.

243404231093 is a deficient number, since it is larger than the sum of its proper divisors (1).

243404231093 is an equidigital number, since it uses as much as digits as its factorization.

243404231093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 243404231093 in words is "two hundred forty-three billion, four hundred four million, two hundred thirty-one thousand, ninety-three".