9189878273 has 2 divisors, whose sum is σ = 9189878274. Its totient is φ = 9189878272.

The previous prime is 9189878227. The next prime is 9189878279. The reversal of 9189878273 is 3728789819.

9189878273 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6861140224 + 2328738049 = 82832^2 + 48257^2 .

It is an emirp because it is prime and its reverse (3728789819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9189878273 - 2²⁰ = 9188829697 is a prime.

It is not a weakly prime, because it can be changed into another prime (9189878279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4594939136 + 4594939137.

It is an arithmetic number, because the mean of its divisors is an integer number (4594939137).

Almost surely, 2^9189878273 is an apocalyptic number.

It is an amenable number.

9189878273 is a deficient number, since it is larger than the sum of its proper divisors (1).

9189878273 is an equidigital number, since it uses as much as digits as its factorization.

9189878273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 62.

The square root of 9189878273 is about 95863.8527965573. The cubic root of 9189878273 is about 2094.6103875773.

The spelling of 9189878273 in words is "nine billion, one hundred eighty-nine million, eight hundred seventy-eight thousand, two hundred seventy-three".