8404189 has 2 divisors, whose sum is σ = 8404190. Its totient is φ = 8404188.

The previous prime is 8404183. The next prime is 8404219. The reversal of 8404189 is 9814048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6416089 + 1988100 = 2533^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404189 - 2⁹ = 8403677 is a prime.

8404189 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404183) 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, 4202094 + 4202095.

It is an arithmetic number, because the mean of its divisors is an integer number (4202095).

Almost surely, 2^8404189 is an apocalyptic number.

It is an amenable number.

8404189 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404189 is an equidigital number, since it uses as much as digits as its factorization.

8404189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 8404189 is about 2898.9979303201. The cubic root of 8404189 is about 203.3130568930.

The spelling of 8404189 in words is "eight million, four hundred four thousand, one hundred eighty-nine".