243296939 has 2 divisors, whose sum is σ = 243296940. Its totient is φ = 243296938.

The previous prime is 243296927. The next prime is 243296947. The reversal of 243296939 is 939692342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243296939 - 2⁴ = 243296923 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243296893 and 243296902.

It is not a weakly prime, because it can be changed into another prime (243296239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121648469 + 121648470.

It is an arithmetic number, because the mean of its divisors is an integer number (121648470).

Almost surely, 2^243296939 is an apocalyptic number.

243296939 is a deficient number, since it is larger than the sum of its proper divisors (1).

243296939 is an equidigital number, since it uses as much as digits as its factorization.

243296939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 47.

The square root of 243296939 is about 15597.9786831499. The cubic root of 243296939 is about 624.2792237033.

The spelling of 243296939 in words is "two hundred forty-three million, two hundred ninety-six thousand, nine hundred thirty-nine".