243013243489 has 2 divisors, whose sum is σ = 243013243490. Its totient is φ = 243013243488.

The previous prime is 243013243477. The next prime is 243013243549. The reversal of 243013243489 is 984342310342.

243013243489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236837955600 + 6175287889 = 486660^2 + 78583^2 .

It is a cyclic number.

It is not a de Polignac number, because 243013243489 - 2¹⁷ = 243013112417 is a prime.

It is a super-2 number, since 2×243013243489² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243013243289) 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, 121506621744 + 121506621745.

It is an arithmetic number, because the mean of its divisors is an integer number (121506621745).

Almost surely, 2^243013243489 is an apocalyptic number.

It is an amenable number.

243013243489 is a deficient number, since it is larger than the sum of its proper divisors (1).

243013243489 is an equidigital number, since it uses as much as digits as its factorization.

243013243489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 243013243489 in words is "two hundred forty-three billion, thirteen million, two hundred forty-three thousand, four hundred eighty-nine".