243323393 has 2 divisors, whose sum is σ = 243323394. Its totient is φ = 243323392.

The previous prime is 243323387. The next prime is 243323413. The reversal of 243323393 is 393323342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237529744 + 5793649 = 15412^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 243323393 - 2¹⁰ = 243322369 is a prime.

It is equal to p_13333694 and since 243323393 and 13333694 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (243323293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121661696 + 121661697.

It is an arithmetic number, because the mean of its divisors is an integer number (121661697).

Almost surely, 2^243323393 is an apocalyptic number.

It is an amenable number.

243323393 is a deficient number, since it is larger than the sum of its proper divisors (1).

243323393 is an equidigital number, since it uses as much as digits as its factorization.

243323393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 32.

The square root of 243323393 is about 15598.8266545917. The cubic root of 243323393 is about 624.3018491203.

The spelling of 243323393 in words is "two hundred forty-three million, three hundred twenty-three thousand, three hundred ninety-three".