243430000399 has 2 divisors, whose sum is σ = 243430000400. Its totient is φ = 243430000398.

The previous prime is 243430000397. The next prime is 243430000409. The reversal of 243430000399 is 993000034342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243430000399 - 2¹ = 243430000397 is a prime.

Together with 243430000397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243430000397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715000199 + 121715000200.

It is an arithmetic number, because the mean of its divisors is an integer number (121715000200).

Almost surely, 2^243430000399 is an apocalyptic number.

243430000399 is a deficient number, since it is larger than the sum of its proper divisors (1).

243430000399 is an equidigital number, since it uses as much as digits as its factorization.

243430000399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 37.

The spelling of 243430000399 in words is "two hundred forty-three billion, four hundred thirty million, three hundred ninety-nine", and thus it is an aban number.