243836113 has 2 divisors, whose sum is σ = 243836114. Its totient is φ = 243836112.

The previous prime is 243836069. The next prime is 243836137. The reversal of 243836113 is 311638342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231283264 + 12552849 = 15208^2 + 3543^2 .

It is a cyclic number.

It is not a de Polignac number, because 243836113 - 2¹⁷ = 243705041 is a prime.

It is not a weakly prime, because it can be changed into another prime (243836413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121918056 + 121918057.

It is an arithmetic number, because the mean of its divisors is an integer number (121918057).

Almost surely, 2^243836113 is an apocalyptic number.

It is an amenable number.

243836113 is a deficient number, since it is larger than the sum of its proper divisors (1).

243836113 is an equidigital number, since it uses as much as digits as its factorization.

243836113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 243836113 is about 15615.2525756070. The cubic root of 243836113 is about 624.7400416496.

The spelling of 243836113 in words is "two hundred forty-three million, eight hundred thirty-six thousand, one hundred thirteen".