243338121959 has 2 divisors, whose sum is σ = 243338121960. Its totient is φ = 243338121958.

The previous prime is 243338121931. The next prime is 243338121973. The reversal of 243338121959 is 959121833342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243338121959 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243338121259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121669060979 + 121669060980.

It is an arithmetic number, because the mean of its divisors is an integer number (121669060980).

Almost surely, 2^243338121959 is an apocalyptic number.

243338121959 is a deficient number, since it is larger than the sum of its proper divisors (1).

243338121959 is an equidigital number, since it uses as much as digits as its factorization.

243338121959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The spelling of 243338121959 in words is "two hundred forty-three billion, three hundred thirty-eight million, one hundred twenty-one thousand, nine hundred fifty-nine".