3967081 has 2 divisors, whose sum is σ = 3967082. Its totient is φ = 3967080.

The previous prime is 3967057. The next prime is 3967087. The reversal of 3967081 is 1807693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2277081 + 1690000 = 1509^2 + 1300^2 .

It is an emirp because it is prime and its reverse (1807693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3967081 - 2⁵ = 3967049 is a prime.

It is a super-2 number, since 2×3967081² = 31475463321122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3967087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983540 + 1983541.

It is an arithmetic number, because the mean of its divisors is an integer number (1983541).

Almost surely, 2^3967081 is an apocalyptic number.

It is an amenable number.

3967081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3967081 is an equidigital number, since it uses as much as digits as its factorization.

3967081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 3967081 is about 1991.7532477694. The cubic root of 3967081 is about 158.3034413253.

The spelling of 3967081 in words is "three million, nine hundred sixty-seven thousand, eighty-one".