243343291 has 2 divisors, whose sum is σ = 243343292. Its totient is φ = 243343290.

The previous prime is 243343267. The next prime is 243343327. The reversal of 243343291 is 192343342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243343291 - 2⁵ = 243343259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243343231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121671645 + 121671646.

It is an arithmetic number, because the mean of its divisors is an integer number (121671646).

Almost surely, 2^243343291 is an apocalyptic number.

243343291 is a deficient number, since it is larger than the sum of its proper divisors (1).

243343291 is an equidigital number, since it uses as much as digits as its factorization.

243343291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 243343291 is about 15599.4644459353. The cubic root of 243343291 is about 624.3188662806.

The spelling of 243343291 in words is "two hundred forty-three million, three hundred forty-three thousand, two hundred ninety-one".