243629569 has 2 divisors, whose sum is σ = 243629570. Its totient is φ = 243629568.

The previous prime is 243629563. The next prime is 243629587. The reversal of 243629569 is 965926342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180633600 + 62995969 = 13440^2 + 7937^2 .

It is a cyclic number.

It is not a de Polignac number, because 243629569 - 2²³ = 235240961 is a prime.

It is a super-2 number, since 2×243629569² = 118710733782251522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243629563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121814784 + 121814785.

It is an arithmetic number, because the mean of its divisors is an integer number (121814785).

Almost surely, 2^243629569 is an apocalyptic number.

It is an amenable number.

243629569 is a deficient number, since it is larger than the sum of its proper divisors (1).

243629569 is an equidigital number, since it uses as much as digits as its factorization.

243629569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The square root of 243629569 is about 15608.6376407424. The cubic root of 243629569 is about 624.5635942309.

The spelling of 243629569 in words is "two hundred forty-three million, six hundred twenty-nine thousand, five hundred sixty-nine".