3941209 has 2 divisors, whose sum is σ = 3941210. Its totient is φ = 3941208.

The previous prime is 3941183. The next prime is 3941233. The reversal of 3941209 is 9021493.

It is a happy number.

3941209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 861184 = 1755^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 3941209 - 2⁷ = 3941081 is a prime.

It is not a weakly prime, because it can be changed into another prime (3941299) 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, 1970604 + 1970605.

It is an arithmetic number, because the mean of its divisors is an integer number (1970605).

Almost surely, 2^3941209 is an apocalyptic number.

It is an amenable number.

3941209 is a deficient number, since it is larger than the sum of its proper divisors (1).

3941209 is an equidigital number, since it uses as much as digits as its factorization.

3941209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3941209 is about 1985.2478434694. The cubic root of 3941209 is about 157.9585561333.

The spelling of 3941209 in words is "three million, nine hundred forty-one thousand, two hundred nine".