243430037 has 2 divisors, whose sum is σ = 243430038. Its totient is φ = 243430036.

The previous prime is 243429971. The next prime is 243430043. The reversal of 243430037 is 730034342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217887121 + 25542916 = 14761^2 + 5054^2 .

It is a cyclic number.

It is not a de Polignac number, because 243430037 - 2²⁴ = 226652821 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243429988 and 243430015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243430237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715018 + 121715019.

It is an arithmetic number, because the mean of its divisors is an integer number (121715019).

Almost surely, 2^243430037 is an apocalyptic number.

It is an amenable number.

243430037 is a deficient number, since it is larger than the sum of its proper divisors (1).

243430037 is an equidigital number, since it uses as much as digits as its factorization.

243430037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 26.

The square root of 243430037 is about 15602.2446141573. The cubic root of 243430037 is about 624.3930423280.

Adding to 243430037 its reverse (730034342), we get a palindrome (973464379).

The spelling of 243430037 in words is "two hundred forty-three million, four hundred thirty thousand, thirty-seven".