243340337 has 2 divisors, whose sum is σ = 243340338. Its totient is φ = 243340336.

The previous prime is 243340319. The next prime is 243340381. The reversal of 243340337 is 733043342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135512881 + 107827456 = 11641^2 + 10384^2 .

It is a cyclic number.

It is not a de Polignac number, because 243340337 - 2⁸ = 243340081 is a prime.

It is a super-2 number, since 2×243340337² = 118429039222547138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243340637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121670168 + 121670169.

It is an arithmetic number, because the mean of its divisors is an integer number (121670169).

Almost surely, 2^243340337 is an apocalyptic number.

It is an amenable number.

243340337 is a deficient number, since it is larger than the sum of its proper divisors (1).

243340337 is an equidigital number, since it uses as much as digits as its factorization.

243340337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 29.

The square root of 243340337 is about 15599.3697629103. The cubic root of 243340337 is about 624.3163400205.

Adding to 243340337 its reverse (733043342), we get a palindrome (976383679).

The spelling of 243340337 in words is "two hundred forty-three million, three hundred forty thousand, three hundred thirty-seven".