243887243 has 2 divisors, whose sum is σ = 243887244. Its totient is φ = 243887242.

The previous prime is 243887227. The next prime is 243887251. The reversal of 243887243 is 342788342.

243887243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243887243 - 2⁴ = 243887227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243887243.

It is not a weakly prime, because it can be changed into another prime (243887543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121943621 + 121943622.

It is an arithmetic number, because the mean of its divisors is an integer number (121943622).

Almost surely, 2^243887243 is an apocalyptic number.

243887243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243887243 is an equidigital number, since it uses as much as digits as its factorization.

243887243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 41.

The square root of 243887243 is about 15616.8896711221. The cubic root of 243887243 is about 624.7837058489.

The spelling of 243887243 in words is "two hundred forty-three million, eight hundred eighty-seven thousand, two hundred forty-three".