243326947 has 2 divisors, whose sum is σ = 243326948. Its totient is φ = 243326946.

The previous prime is 243326929. The next prime is 243326953. The reversal of 243326947 is 749623342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243326947 - 2¹¹ = 243324899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243326957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121663473 + 121663474.

It is an arithmetic number, because the mean of its divisors is an integer number (121663474).

Almost surely, 2^243326947 is an apocalyptic number.

243326947 is a deficient number, since it is larger than the sum of its proper divisors (1).

243326947 is an equidigital number, since it uses as much as digits as its factorization.

243326947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 40.

The square root of 243326947 is about 15598.9405730005. The cubic root of 243326947 is about 624.3048886389.

The spelling of 243326947 in words is "two hundred forty-three million, three hundred twenty-six thousand, nine hundred forty-seven".