243045239999 has 4 divisors (see below), whose sum is σ = 243359658936. Its totient is φ = 242730821064.

The previous prime is 243045239989. The next prime is 243045240001. The reversal of 243045239999 is 999932540342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243045239999 - 2⁸ = 243045239743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243045239939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157208309 + ... + 157209854.

It is an arithmetic number, because the mean of its divisors is an integer number (60839914734).

Almost surely, 2^243045239999 is an apocalyptic number.

243045239999 is a deficient number, since it is larger than the sum of its proper divisors (314418937).

243045239999 is an equidigital number, since it uses as much as digits as its factorization.

243045239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314418936.

The product of its (nonzero) digits is 18895680, while the sum is 59.

The spelling of 243045239999 in words is "two hundred forty-three billion, forty-five million, two hundred thirty-nine thousand, nine hundred ninety-nine".