243003344420117 has 2 divisors, whose sum is σ = 243003344420118. Its totient is φ = 243003344420116.

The previous prime is 243003344420077. The next prime is 243003344420119. The reversal of 243003344420117 is 711024443300342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165443160225841 + 77560184194276 = 12862471^2 + 8806826^2 .

It is a cyclic number.

It is not a de Polignac number, because 243003344420117 - 2²² = 243003340225813 is a prime.

Together with 243003344420119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243003344420119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121501672210058 + 121501672210059.

It is an arithmetic number, because the mean of its divisors is an integer number (121501672210059).

Almost surely, 2^{243003344420117} is an apocalyptic number.

It is an amenable number.

243003344420117 is a deficient number, since it is larger than the sum of its proper divisors (1).

243003344420117 is an equidigital number, since it uses as much as digits as its factorization.

243003344420117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 38.

Adding to 243003344420117 its reverse (711024443300342), we get a palindrome (954027787720459).

The spelling of 243003344420117 in words is "two hundred forty-three trillion, three billion, three hundred forty-four million, four hundred twenty thousand, one hundred seventeen".