243081289 has 8 divisors (see below), whose sum is σ = 265712832. Its totient is φ = 220538640.

The previous prime is 243081287. The next prime is 243081299. The reversal of 243081289 is 982180342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243081289 - 2¹ = 243081287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243081287) 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 in 7 ways as a sum of consecutive naturals, for example, 16434 + ... + 27499.

It is an arithmetic number, because the mean of its divisors is an integer number (33214104).

Almost surely, 2^243081289 is an apocalyptic number.

It is an amenable number.

243081289 is a deficient number, since it is larger than the sum of its proper divisors (22631543).

243081289 is a wasteful number, since it uses less digits than its factorization.

243081289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44447.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 243081289 is about 15591.0643959930. The cubic root of 243081289 is about 624.0947226698.

The spelling of 243081289 in words is "two hundred forty-three million, eighty-one thousand, two hundred eighty-nine".