3966857 has 2 divisors, whose sum is σ = 3966858. Its totient is φ = 3966856.

The previous prime is 3966817. The next prime is 3966863. The reversal of 3966857 is 7586693.

3966857 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., 3857296 + 109561 = 1964^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 3966857 - 2¹⁰ = 3965833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3966817) 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, 1983428 + 1983429.

It is an arithmetic number, because the mean of its divisors is an integer number (1983429).

Almost surely, 2^3966857 is an apocalyptic number.

It is an amenable number.

3966857 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966857 is an equidigital number, since it uses as much as digits as its factorization.

3966857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 44.

The square root of 3966857 is about 1991.6970151105. The cubic root of 3966857 is about 158.3004617509.

The spelling of 3966857 in words is "three million, nine hundred sixty-six thousand, eight hundred fifty-seven".