243042995999 has 2 divisors, whose sum is σ = 243042996000. Its totient is φ = 243042995998.

The previous prime is 243042995969. The next prime is 243042996017. The reversal of 243042995999 is 999599240342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243042995999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243042995969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521497999 + 121521498000.

It is an arithmetic number, because the mean of its divisors is an integer number (121521498000).

Almost surely, 2^243042995999 is an apocalyptic number.

243042995999 is a deficient number, since it is larger than the sum of its proper divisors (1).

243042995999 is an equidigital number, since it uses as much as digits as its factorization.

243042995999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56687040, while the sum is 65.

The spelling of 243042995999 in words is "two hundred forty-three billion, forty-two million, nine hundred ninety-five thousand, nine hundred ninety-nine".