243904337 has 2 divisors, whose sum is σ = 243904338. Its totient is φ = 243904336.

The previous prime is 243904319. The next prime is 243904361. The reversal of 243904337 is 733409342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167935681 + 75968656 = 12959^2 + 8716^2 .

It is a cyclic number.

It is not a de Polignac number, because 243904337 - 2¹⁰ = 243903313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243904297 and 243904306.

It is not a weakly prime, because it can be changed into another prime (243904307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121952168 + 121952169.

It is an arithmetic number, because the mean of its divisors is an integer number (121952169).

Almost surely, 2^243904337 is an apocalyptic number.

It is an amenable number.

243904337 is a deficient number, since it is larger than the sum of its proper divisors (1).

243904337 is an equidigital number, since it uses as much as digits as its factorization.

243904337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 243904337 is about 15617.4369536105. The cubic root of 243904337 is about 624.7983024893.

The spelling of 243904337 in words is "two hundred forty-three million, nine hundred four thousand, three hundred thirty-seven".