243030769 has 2 divisors, whose sum is σ = 243030770. Its totient is φ = 243030768.

The previous prime is 243030743. The next prime is 243030779. The reversal of 243030769 is 967030342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 102252544 = 11865^2 + 10112^2 .

It is a cyclic number.

It is not a de Polignac number, because 243030769 - 2⁵ = 243030737 is a prime.

It is a super-2 number, since 2×243030769² = 118127909361462722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243030779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121515384 + 121515385.

It is an arithmetic number, because the mean of its divisors is an integer number (121515385).

Almost surely, 2^243030769 is an apocalyptic number.

It is an amenable number.

243030769 is a deficient number, since it is larger than the sum of its proper divisors (1).

243030769 is an equidigital number, since it uses as much as digits as its factorization.

243030769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 243030769 is about 15589.4441530158. Note that the first 3 decimals coincide. The cubic root of 243030769 is about 624.0514841164.

The spelling of 243030769 in words is "two hundred forty-three million, thirty thousand, seven hundred sixty-nine".