243441099989 has 4 divisors (see below), whose sum is σ = 243456414156. Its totient is φ = 243425785824.

The previous prime is 243441099907. The next prime is 243441099991. The reversal of 243441099989 is 989990144342.

243441099989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 204341969764 + 39099130225 = 452042^2 + 197735^2 .

It is a cyclic number.

It is not a de Polignac number, because 243441099989 - 2²⁸ = 243172664533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243441099589) 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 in 3 ways as a sum of consecutive naturals, for example, 7633214 + ... + 7665039.

It is an arithmetic number, because the mean of its divisors is an integer number (60864103539).

Almost surely, 2^243441099989 is an apocalyptic number.

It is an amenable number.

243441099989 is a deficient number, since it is larger than the sum of its proper divisors (15314167).

243441099989 is a wasteful number, since it uses less digits than its factorization.

243441099989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15314166.

The product of its (nonzero) digits is 20155392, while the sum is 62.

The spelling of 243441099989 in words is "two hundred forty-three billion, four hundred forty-one million, ninety-nine thousand, nine hundred eighty-nine".