9665189 has 2 divisors, whose sum is σ = 9665190. Its totient is φ = 9665188.

The previous prime is 9665143. The next prime is 9665209. The reversal of 9665189 is 9815669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6630625 + 3034564 = 2575^2 + 1742^2 .

It is an emirp because it is prime and its reverse (9815669) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9665189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661189) 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 as a sum of consecutive naturals, namely, 4832594 + 4832595.

It is an arithmetic number, because the mean of its divisors is an integer number (4832595).

Almost surely, 2^9665189 is an apocalyptic number.

It is an amenable number.

9665189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9665189 is an equidigital number, since it uses as much as digits as its factorization.

9665189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 44.

The square root of 9665189 is about 3108.8887082043. Note that the first 3 decimals coincide. The cubic root of 9665189 is about 213.0116960376.

The spelling of 9665189 in words is "nine million, six hundred sixty-five thousand, one hundred eighty-nine".