243234415399 has 2 divisors, whose sum is σ = 243234415400. Its totient is φ = 243234415398.

The previous prime is 243234415381. The next prime is 243234415451. The reversal of 243234415399 is 993514432342.

243234415399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243234415399 - 2⁵ = 243234415367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243234415309) 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, 121617207699 + 121617207700.

It is an arithmetic number, because the mean of its divisors is an integer number (121617207700).

Almost surely, 2^243234415399 is an apocalyptic number.

243234415399 is a deficient number, since it is larger than the sum of its proper divisors (1).

243234415399 is an equidigital number, since it uses as much as digits as its factorization.

243234415399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 49.

The spelling of 243234415399 in words is "two hundred forty-three billion, two hundred thirty-four million, four hundred fifteen thousand, three hundred ninety-nine".