243241969 has 2 divisors, whose sum is σ = 243241970. Its totient is φ = 243241968.

The previous prime is 243241961. The next prime is 243241987. The reversal of 243241969 is 969142342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235469025 + 7772944 = 15345^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 243241969 - 2³ = 243241961 is a prime.

It is a super-2 number, since 2×243241969² = 118333310965993922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243241961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121620984 + 121620985.

It is an arithmetic number, because the mean of its divisors is an integer number (121620985).

Almost surely, 2^243241969 is an apocalyptic number.

It is an amenable number.

243241969 is a deficient number, since it is larger than the sum of its proper divisors (1).

243241969 is an equidigital number, since it uses as much as digits as its factorization.

243241969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 243241969 is about 15596.2164963173. The cubic root of 243241969 is about 624.2322040492.

The spelling of 243241969 in words is "two hundred forty-three million, two hundred forty-one thousand, nine hundred sixty-nine".