3944189 has 2 divisors, whose sum is σ = 3944190. Its totient is φ = 3944188.

The previous prime is 3944183. The next prime is 3944219. The reversal of 3944189 is 9814493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3003289 + 940900 = 1733^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944189 - 2⁴ = 3944173 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 (3944183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972094 + 1972095.

It is an arithmetic number, because the mean of its divisors is an integer number (1972095).

Almost surely, 2^3944189 is an apocalyptic number.

It is an amenable number.

3944189 is a deficient number, since it is larger than the sum of its proper divisors (1).

3944189 is an equidigital number, since it uses as much as digits as its factorization.

3944189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 3944189 is about 1985.9982376629. The cubic root of 3944189 is about 157.9983576179.

The spelling of 3944189 in words is "three million, nine hundred forty-four thousand, one hundred eighty-nine".