243003344420077 has 2 divisors, whose sum is σ = 243003344420078. Its totient is φ = 243003344420076.

The previous prime is 243003344420071. The next prime is 243003344420117. The reversal of 243003344420077 is 770024443300342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242960367398596 + 42977021481 = 15587186^2 + 207309^2 .

It is a cyclic number.

It is not a de Polignac number, because 243003344420077 - 2³ = 243003344420069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243003344420071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121501672210038 + 121501672210039.

It is an arithmetic number, because the mean of its divisors is an integer number (121501672210039).

Almost surely, 2^{243003344420077} is an apocalyptic number.

It is an amenable number.

243003344420077 is a deficient number, since it is larger than the sum of its proper divisors (1).

243003344420077 is an equidigital number, since it uses as much as digits as its factorization.

243003344420077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 43.

The spelling of 243003344420077 in words is "two hundred forty-three trillion, three billion, three hundred forty-four million, four hundred twenty thousand, seventy-seven".