243430000397 has 2 divisors, whose sum is σ = 243430000398. Its totient is φ = 243430000396.

The previous prime is 243430000237. The next prime is 243430000399. The reversal of 243430000397 is 793000034342.

It is a happy number.

243430000397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164656596841 + 78773403556 = 405779^2 + 280666^2 .

It is a cyclic number.

It is not a de Polignac number, because 243430000397 - 2¹² = 243429996301 is a prime.

Together with 243430000399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243430000399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715000198 + 121715000199.

It is an arithmetic number, because the mean of its divisors is an integer number (121715000199).

Almost surely, 2^243430000397 is an apocalyptic number.

It is an amenable number.

243430000397 is a deficient number, since it is larger than the sum of its proper divisors (1).

243430000397 is an equidigital number, since it uses as much as digits as its factorization.

243430000397 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 spelling of 243430000397 in words is "two hundred forty-three billion, four hundred thirty million, three hundred ninety-seven", and thus it is an aban number.