3992081 has 2 divisors, whose sum is σ = 3992082. Its totient is φ = 3992080.

The previous prime is 3992069. The next prime is 3992083. The reversal of 3992081 is 1802993.

3992081 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., 2611456 + 1380625 = 1616^2 + 1175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3992081 is a prime.

It is a super-2 number, since 2×3992081² = 31873421421122, which contains 22 as substring.

Together with 3992083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3992083) 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, 1996040 + 1996041.

It is an arithmetic number, because the mean of its divisors is an integer number (1996041).

Almost surely, 2^3992081 is an apocalyptic number.

It is an amenable number.

3992081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3992081 is an equidigital number, since it uses as much as digits as its factorization.

3992081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 3992081 is about 1998.0192691764. The cubic root of 3992081 is about 158.6352807499.

The spelling of 3992081 in words is "three million, nine hundred ninety-two thousand, eighty-one".