3981863 has 2 divisors, whose sum is σ = 3981864. Its totient is φ = 3981862.

The previous prime is 3981847. The next prime is 3981869. The reversal of 3981863 is 3681893.

3981863 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 3981863 - 2⁴ = 3981847 is a prime.

It is a Chen prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981869) 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, 1990931 + 1990932.

It is an arithmetic number, because the mean of its divisors is an integer number (1990932).

Almost surely, 2^3981863 is an apocalyptic number.

3981863 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981863 is an equidigital number, since it uses as much as digits as its factorization.

3981863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 3981863 is about 1995.4605984584. The cubic root of 3981863 is about 158.4998192172.

The spelling of 3981863 in words is "three million, nine hundred eighty-one thousand, eight hundred sixty-three".