243040801 has 2 divisors, whose sum is σ = 243040802. Its totient is φ = 243040800.

The previous prime is 243040781. The next prime is 243040813. The reversal of 243040801 is 108040342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242611776 + 429025 = 15576^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 243040801 - 2¹¹ = 243038753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243040841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121520400 + 121520401.

It is an arithmetic number, because the mean of its divisors is an integer number (121520401).

Almost surely, 2^243040801 is an apocalyptic number.

It is an amenable number.

243040801 is a deficient number, since it is larger than the sum of its proper divisors (1).

243040801 is an equidigital number, since it uses as much as digits as its factorization.

243040801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 243040801 is about 15589.7659058756. The cubic root of 243040801 is about 624.0600706812.

The spelling of 243040801 in words is "two hundred forty-three million, forty thousand, eight hundred one".