3947663 has 2 divisors, whose sum is σ = 3947664. Its totient is φ = 3947662.

The previous prime is 3947659. The next prime is 3947693. The reversal of 3947663 is 3667493.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3947663 - 2² = 3947659 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3947623) 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, 1973831 + 1973832.

It is an arithmetic number, because the mean of its divisors is an integer number (1973832).

Almost surely, 2^3947663 is an apocalyptic number.

3947663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947663 is an equidigital number, since it uses as much as digits as its factorization.

3947663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 38.

The square root of 3947663 is about 1986.8726682905. The cubic root of 3947663 is about 158.0447317667.

The spelling of 3947663 in words is "three million, nine hundred forty-seven thousand, six hundred sixty-three".