243424273 has 2 divisors, whose sum is σ = 243424274. Its totient is φ = 243424272.

The previous prime is 243424189. The next prime is 243424301. The reversal of 243424273 is 372424342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209178369 + 34245904 = 14463^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 243424273 - 2²⁵ = 209869841 is a prime.

It is not a weakly prime, because it can be changed into another prime (243424673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121712136 + 121712137.

It is an arithmetic number, because the mean of its divisors is an integer number (121712137).

Almost surely, 2^243424273 is an apocalyptic number.

It is an amenable number.

243424273 is a deficient number, since it is larger than the sum of its proper divisors (1).

243424273 is an equidigital number, since it uses as much as digits as its factorization.

243424273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 31.

The square root of 243424273 is about 15602.0598960522. The cubic root of 243424273 is about 624.3881141085.

The spelling of 243424273 in words is "two hundred forty-three million, four hundred twenty-four thousand, two hundred seventy-three".