243253393 has 2 divisors, whose sum is σ = 243253394. Its totient is φ = 243253392.

The previous prime is 243253343. The next prime is 243253441. The reversal of 243253393 is 393352342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232044289 + 11209104 = 15233^2 + 3348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243253393 is a prime.

It is not a weakly prime, because it can be changed into another prime (243253343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121626696 + 121626697.

It is an arithmetic number, because the mean of its divisors is an integer number (121626697).

Almost surely, 2^243253393 is an apocalyptic number.

It is an amenable number.

243253393 is a deficient number, since it is larger than the sum of its proper divisors (1).

243253393 is an equidigital number, since it uses as much as digits as its factorization.

243253393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 34.

The square root of 243253393 is about 15596.5827346890. The cubic root of 243253393 is about 624.2419763720.

The spelling of 243253393 in words is "two hundred forty-three million, two hundred fifty-three thousand, three hundred ninety-three".