3966817 has 2 divisors, whose sum is σ = 3966818. Its totient is φ = 3966816.

The previous prime is 3966803. The next prime is 3966857. The reversal of 3966817 is 7186693.

3966817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3966857) can be obtained adding 3966817 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2119936 + 1846881 = 1456^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 3966817 - 2⁷ = 3966689 is a prime.

It is a super-2 number, since 2×3966817² = 31471274222978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3966817.

It is not a weakly prime, because it can be changed into another prime (3966857) 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, 1983408 + 1983409.

It is an arithmetic number, because the mean of its divisors is an integer number (1983409).

Almost surely, 2^3966817 is an apocalyptic number.

It is an amenable number.

3966817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966817 is an equidigital number, since it uses as much as digits as its factorization.

3966817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 3966817 is about 1991.6869733972. The cubic root of 3966817 is about 158.2999296723.

The spelling of 3966817 in words is "three million, nine hundred sixty-six thousand, eight hundred seventeen".