243982897 has 2 divisors, whose sum is σ = 243982898. Its totient is φ = 243982896.

The previous prime is 243982891. The next prime is 243982913. The reversal of 243982897 is 798289342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191434896 + 52548001 = 13836^2 + 7249^2 .

It is a cyclic number.

It is not a de Polignac number, because 243982897 - 2⁷ = 243982769 is a prime.

It is not a weakly prime, because it can be changed into another prime (243982891) 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, 121991448 + 121991449.

It is an arithmetic number, because the mean of its divisors is an integer number (121991449).

Almost surely, 2^243982897 is an apocalyptic number.

It is an amenable number.

243982897 is a deficient number, since it is larger than the sum of its proper divisors (1).

243982897 is an equidigital number, since it uses as much as digits as its factorization.

243982897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 243982897 is about 15619.9518885303. The cubic root of 243982897 is about 624.8653764445.

The spelling of 243982897 in words is "two hundred forty-three million, nine hundred eighty-two thousand, eight hundred ninety-seven".