243223069 has 2 divisors, whose sum is σ = 243223070. Its totient is φ = 243223068.

The previous prime is 243223037. The next prime is 243223147. The reversal of 243223069 is 960322342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243204025 + 19044 = 15595^2 + 138^2 .

It is a cyclic number.

It is not a de Polignac number, because 243223069 - 2⁵ = 243223037 is a prime.

It is a super-2 number, since 2×243223069² = 118314922587557522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243223069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243223469) 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, 121611534 + 121611535.

It is an arithmetic number, because the mean of its divisors is an integer number (121611535).

Almost surely, 2^243223069 is an apocalyptic number.

It is an amenable number.

243223069 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223069 is an equidigital number, since it uses as much as digits as its factorization.

243223069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 243223069 is about 15595.6105683619. The cubic root of 243223069 is about 624.2160359317.

The spelling of 243223069 in words is "two hundred forty-three million, two hundred twenty-three thousand, sixty-nine".