3956917 has 2 divisors, whose sum is σ = 3956918. Its totient is φ = 3956916.

The previous prime is 3956881. The next prime is 3956941. The reversal of 3956917 is 7196593.

3956917 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., 2531281 + 1425636 = 1591^2 + 1194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3956917 is a prime.

It is a Chen prime.

3956917 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3956917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956957) 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, 1978458 + 1978459.

It is an arithmetic number, because the mean of its divisors is an integer number (1978459).

Almost surely, 2^3956917 is an apocalyptic number.

It is an amenable number.

3956917 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956917 is an equidigital number, since it uses as much as digits as its factorization.

3956917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 3956917 is about 1989.2000904886. The cubic root of 3956917 is about 158.1681300586.

The spelling of 3956917 in words is "three million, nine hundred fifty-six thousand, nine hundred seventeen".