243404122909049 has 2 divisors, whose sum is σ = 243404122909050. Its totient is φ = 243404122909048.

The previous prime is 243404122909027. The next prime is 243404122909063. The reversal of 243404122909049 is 940909221404342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201213317161024 + 42190805748025 = 14184968^2 + 6495445^2 .

It is a cyclic number.

It is not a de Polignac number, because 243404122909049 - 2²⁴ = 243404106131833 is a prime.

It is not a weakly prime, because it can be changed into another prime (243404122909099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121702061454524 + 121702061454525.

It is an arithmetic number, because the mean of its divisors is an integer number (121702061454525).

Almost surely, 2^{243404122909049} is an apocalyptic number.

It is an amenable number.

243404122909049 is a deficient number, since it is larger than the sum of its proper divisors (1).

243404122909049 is an equidigital number, since it uses as much as digits as its factorization.

243404122909049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4478976, while the sum is 53.

The spelling of 243404122909049 in words is "two hundred forty-three trillion, four hundred four billion, one hundred twenty-two million, nine hundred nine thousand, forty-nine".