3946643 has 2 divisors, whose sum is σ = 3946644. Its totient is φ = 3946642.

The previous prime is 3946597. The next prime is 3946673. The reversal of 3946643 is 3466493.

It is a happy number.

3946643 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 is a cyclic number.

It is not a de Polignac number, because 3946643 - 2⁸ = 3946387 is a prime.

It is not a weakly prime, because it can be changed into another prime (3946673) 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, 1973321 + 1973322.

It is an arithmetic number, because the mean of its divisors is an integer number (1973322).

Almost surely, 2^3946643 is an apocalyptic number.

3946643 is a deficient number, since it is larger than the sum of its proper divisors (1).

3946643 is an equidigital number, since it uses as much as digits as its factorization.

3946643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 35.

The square root of 3946643 is about 1986.6159669146. The cubic root of 3946643 is about 158.0311186904.

The spelling of 3946643 in words is "three million, nine hundred forty-six thousand, six hundred forty-three".