243308113 has 2 divisors, whose sum is σ = 243308114. Its totient is φ = 243308112.

The previous prime is 243308101. The next prime is 243308123. The reversal of 243308113 is 311803342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243141649 + 166464 = 15593^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 243308113 - 2⁹ = 243307601 is a prime.

It is not a weakly prime, because it can be changed into another prime (243308123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121654056 + 121654057.

It is an arithmetic number, because the mean of its divisors is an integer number (121654057).

Almost surely, 2^243308113 is an apocalyptic number.

It is an amenable number.

243308113 is a deficient number, since it is larger than the sum of its proper divisors (1).

243308113 is an equidigital number, since it uses as much as digits as its factorization.

243308113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 243308113 is about 15598.3368664739. The cubic root of 243308113 is about 624.2887807344.

The spelling of 243308113 in words is "two hundred forty-three million, three hundred eight thousand, one hundred thirteen".