243022442977 has 2 divisors, whose sum is σ = 243022442978. Its totient is φ = 243022442976.

The previous prime is 243022442959. The next prime is 243022443007. The reversal of 243022442977 is 779244220342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205325890641 + 37696552336 = 453129^2 + 194156^2 .

It is a cyclic number.

It is not a de Polignac number, because 243022442977 - 2⁷ = 243022442849 is a prime.

It is not a weakly prime, because it can be changed into another prime (243026442977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121511221488 + 121511221489.

It is an arithmetic number, because the mean of its divisors is an integer number (121511221489).

Almost surely, 2^243022442977 is an apocalyptic number.

It is an amenable number.

243022442977 is a deficient number, since it is larger than the sum of its proper divisors (1).

243022442977 is an equidigital number, since it uses as much as digits as its factorization.

243022442977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 46.

The spelling of 243022442977 in words is "two hundred forty-three billion, twenty-two million, four hundred forty-two thousand, nine hundred seventy-seven".