8539889 has 2 divisors, whose sum is σ = 8539890. Its totient is φ = 8539888.

The previous prime is 8539847. The next prime is 8539901. The reversal of 8539889 is 9889358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7656289 + 883600 = 2767^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 8539889 - 2¹⁶ = 8474353 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8539829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4269944 + 4269945.

It is an arithmetic number, because the mean of its divisors is an integer number (4269945).

Almost surely, 2^8539889 is an apocalyptic number.

It is an amenable number.

8539889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8539889 is an equidigital number, since it uses as much as digits as its factorization.

8539889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 50.

The square root of 8539889 is about 2922.3088474698. The cubic root of 8539889 is about 204.4014984642.

The spelling of 8539889 in words is "eight million, five hundred thirty-nine thousand, eight hundred eighty-nine".