243344309447 has 2 divisors, whose sum is σ = 243344309448. Its totient is φ = 243344309446.

The previous prime is 243344309387. The next prime is 243344309449. The reversal of 243344309447 is 744903443342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243344309447 - 2¹⁰ = 243344308423 is a prime.

Together with 243344309449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243344309449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121672154723 + 121672154724.

It is an arithmetic number, because the mean of its divisors is an integer number (121672154724).

Almost surely, 2^243344309447 is an apocalyptic number.

243344309447 is a deficient number, since it is larger than the sum of its proper divisors (1).

243344309447 is an equidigital number, since it uses as much as digits as its factorization.

243344309447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 47.

The spelling of 243344309447 in words is "two hundred forty-three billion, three hundred forty-four million, three hundred nine thousand, four hundred forty-seven".