3966091 has 2 divisors, whose sum is σ = 3966092. Its totient is φ = 3966090.

The previous prime is 3966089. The next prime is 3966113. The reversal of 3966091 is 1906693.

It is a weak prime.

It is an emirp because it is prime and its reverse (1906693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3966091 - 2¹ = 3966089 is a prime.

Together with 3966089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3966691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983045 + 1983046.

It is an arithmetic number, because the mean of its divisors is an integer number (1983046).

Almost surely, 2^3966091 is an apocalyptic number.

3966091 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966091 is an equidigital number, since it uses as much as digits as its factorization.

3966091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 3966091 is about 1991.5047075013. The cubic root of 3966091 is about 158.2902718231.

The spelling of 3966091 in words is "three million, nine hundred sixty-six thousand, ninety-one".