3981331 has 2 divisors, whose sum is σ = 3981332. Its totient is φ = 3981330.

The previous prime is 3981301. The next prime is 3981343. The reversal of 3981331 is 1331893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3981331 - 2⁹ = 3980819 is a prime.

It is a super-2 number, since 2×3981331² = 31701993063122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3981331.

It is not a weakly prime, because it can be changed into another prime (3981301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990665 + 1990666.

It is an arithmetic number, because the mean of its divisors is an integer number (1990666).

Almost surely, 2^3981331 is an apocalyptic number.

3981331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981331 is an equidigital number, since it uses as much as digits as its factorization.

3981331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 3981331 is about 1995.3272914487. The cubic root of 3981331 is about 158.4927600709.

The spelling of 3981331 in words is "three million, nine hundred eighty-one thousand, three hundred thirty-one".