3994189 has 2 divisors, whose sum is σ = 3994190. Its totient is φ = 3994188.

The previous prime is 3994183. The next prime is 3994213. The reversal of 3994189 is 9814993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 736164 = 1805^2 + 858^2 .

It is an emirp because it is prime and its reverse (9814993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3994189 - 2¹¹ = 3992141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3994183) 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, 1997094 + 1997095.

It is an arithmetic number, because the mean of its divisors is an integer number (1997095).

Almost surely, 2^3994189 is an apocalyptic number.

It is an amenable number.

3994189 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994189 is an equidigital number, since it uses as much as digits as its factorization.

3994189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 3994189 is about 1998.5467219958. The cubic root of 3994189 is about 158.6631980466.

The spelling of 3994189 in words is "three million, nine hundred ninety-four thousand, one hundred eighty-nine".