243234424309 has 2 divisors, whose sum is σ = 243234424310. Its totient is φ = 243234424308.

The previous prime is 243234424297. The next prime is 243234424313. The reversal of 243234424309 is 903424432342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227085606225 + 16148818084 = 476535^2 + 127078^2 .

It is a cyclic number.

It is not a de Polignac number, because 243234424309 - 2⁹ = 243234423797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243234424369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121617212154 + 121617212155.

It is an arithmetic number, because the mean of its divisors is an integer number (121617212155).

Almost surely, 2^243234424309 is an apocalyptic number.

It is an amenable number.

243234424309 is a deficient number, since it is larger than the sum of its proper divisors (1).

243234424309 is an equidigital number, since it uses as much as digits as its factorization.

243234424309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 40.

The spelling of 243234424309 in words is "two hundred forty-three billion, two hundred thirty-four million, four hundred twenty-four thousand, three hundred nine".