9904189 has 2 divisors, whose sum is σ = 9904190. Its totient is φ = 9904188.

The previous prime is 9904157. The next prime is 9904199. The reversal of 9904189 is 9814099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7064964 + 2839225 = 2658^2 + 1685^2 .

It is an emirp because it is prime and its reverse (9814099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9904189 - 2⁵ = 9904157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9904199) 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, 4952094 + 4952095.

It is an arithmetic number, because the mean of its divisors is an integer number (4952095).

Almost surely, 2^9904189 is an apocalyptic number.

It is an amenable number.

9904189 is a deficient number, since it is larger than the sum of its proper divisors (1).

9904189 is an equidigital number, since it uses as much as digits as its factorization.

9904189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 9904189 is about 3147.0921499060. The cubic root of 9904189 is about 214.7531979613.

The spelling of 9904189 in words is "nine million, nine hundred four thousand, one hundred eighty-nine".