3966331 has 2 divisors, whose sum is σ = 3966332. Its totient is φ = 3966330.

The previous prime is 3966329. The next prime is 3966349. The reversal of 3966331 is 1336693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3966331 - 2¹ = 3966329 is a prime.

It is a super-2 number, since 2×3966331² = 31463563203122, which contains 22 as substring.

Together with 3966329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3966293 and 3966302.

It is not a weakly prime, because it can be changed into another prime (3966631) 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, 1983165 + 1983166.

It is an arithmetic number, because the mean of its divisors is an integer number (1983166).

Almost surely, 2^3966331 is an apocalyptic number.

3966331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966331 is an equidigital number, since it uses as much as digits as its factorization.

3966331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 31.

The square root of 3966331 is about 1991.5649625357. The cubic root of 3966331 is about 158.2934646309.

The spelling of 3966331 in words is "three million, nine hundred sixty-six thousand, three hundred thirty-one".