243404123433337 has 2 divisors, whose sum is σ = 243404123433338. Its totient is φ = 243404123433336.

The previous prime is 243404123433221. The next prime is 243404123433347. The reversal of 243404123433337 is 733334321404342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233087975993961 + 10316147439376 = 15267219^2 + 3211876^2 .

It is a cyclic number.

It is not a de Polignac number, because 243404123433337 - 2¹⁹ = 243404122909049 is a prime.

It is not a weakly prime, because it can be changed into another prime (243404123433347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121702061716668 + 121702061716669.

It is an arithmetic number, because the mean of its divisors is an integer number (121702061716669).

Almost surely, 2^{243404123433337} is an apocalyptic number.

It is an amenable number.

243404123433337 is a deficient number, since it is larger than the sum of its proper divisors (1).

243404123433337 is an equidigital number, since it uses as much as digits as its factorization.

243404123433337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 46.

Adding to 243404123433337 its reverse (733334321404342), we get a palindrome (976738444837679).

The spelling of 243404123433337 in words is "two hundred forty-three trillion, four hundred four billion, one hundred twenty-three million, four hundred thirty-three thousand, three hundred thirty-seven".