243203001323 has 2 divisors, whose sum is σ = 243203001324. Its totient is φ = 243203001322.

The previous prime is 243203001319. The next prime is 243203001341. The reversal of 243203001323 is 323100302342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243203001323 - 2² = 243203001319 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (243203001343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121601500661 + 121601500662.

It is an arithmetic number, because the mean of its divisors is an integer number (121601500662).

Almost surely, 2^243203001323 is an apocalyptic number.

243203001323 is a deficient number, since it is larger than the sum of its proper divisors (1).

243203001323 is an equidigital number, since it uses as much as digits as its factorization.

243203001323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 243203001323 its reverse (323100302342), we get a palindrome (566303303665).

The spelling of 243203001323 in words is "two hundred forty-three billion, two hundred three million, one thousand, three hundred twenty-three".