243836568427 has 2 divisors, whose sum is σ = 243836568428. Its totient is φ = 243836568426.

The previous prime is 243836568421. The next prime is 243836568431. The reversal of 243836568427 is 724865638342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243836568427 is a prime.

It is not a weakly prime, because it can be changed into another prime (243836568421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121918284213 + 121918284214.

It is an arithmetic number, because the mean of its divisors is an integer number (121918284214).

Almost surely, 2^243836568427 is an apocalyptic number.

243836568427 is a deficient number, since it is larger than the sum of its proper divisors (1).

243836568427 is an equidigital number, since it uses as much as digits as its factorization.

243836568427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 58.

The spelling of 243836568427 in words is "two hundred forty-three billion, eight hundred thirty-six million, five hundred sixty-eight thousand, four hundred twenty-seven".