243364249 has 2 divisors, whose sum is σ = 243364250. Its totient is φ = 243364248.

The previous prime is 243364241. The next prime is 243364267. The reversal of 243364249 is 942463342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172265625 + 71098624 = 13125^2 + 8432^2 .

It is a cyclic number.

It is not a de Polignac number, because 243364249 - 2³ = 243364241 is a prime.

It is not a weakly prime, because it can be changed into another prime (243364241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121682124 + 121682125.

It is an arithmetic number, because the mean of its divisors is an integer number (121682125).

Almost surely, 2^243364249 is an apocalyptic number.

It is an amenable number.

243364249 is a deficient number, since it is larger than the sum of its proper divisors (1).

243364249 is an equidigital number, since it uses as much as digits as its factorization.

243364249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 37.

The square root of 243364249 is about 15600.1361853030. The cubic root of 243364249 is about 624.3367889707.

The spelling of 243364249 in words is "two hundred forty-three million, three hundred sixty-four thousand, two hundred forty-nine".