243450289 has 2 divisors, whose sum is σ = 243450290. Its totient is φ = 243450288.

The previous prime is 243450281. The next prime is 243450341. The reversal of 243450289 is 982054342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125619264 + 117831025 = 11208^2 + 10855^2 .

It is a cyclic number.

It is not a de Polignac number, because 243450289 - 2³ = 243450281 is a prime.

It is not a weakly prime, because it can be changed into another prime (243450281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121725144 + 121725145.

It is an arithmetic number, because the mean of its divisors is an integer number (121725145).

Almost surely, 2^243450289 is an apocalyptic number.

It is an amenable number.

243450289 is a deficient number, since it is larger than the sum of its proper divisors (1).

243450289 is an equidigital number, since it uses as much as digits as its factorization.

243450289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 243450289 is about 15602.8936098405. The cubic root of 243450289 is about 624.4103571691.

The spelling of 243450289 in words is "two hundred forty-three million, four hundred fifty thousand, two hundred eighty-nine".