3985867 has 2 divisors, whose sum is σ = 3985868. Its totient is φ = 3985866.

The previous prime is 3985859. The next prime is 3985879. The reversal of 3985867 is 7685893.

It is a weak prime.

It is an emirp because it is prime and its reverse (7685893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3985867 - 2³ = 3985859 is a prime.

It is not a weakly prime, because it can be changed into another prime (3985067) 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, 1992933 + 1992934.

It is an arithmetic number, because the mean of its divisors is an integer number (1992934).

Almost surely, 2^3985867 is an apocalyptic number.

3985867 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985867 is an equidigital number, since it uses as much as digits as its factorization.

3985867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 3985867 is about 1996.4636235103. The cubic root of 3985867 is about 158.5529284171.

The spelling of 3985867 in words is "three million, nine hundred eighty-five thousand, eight hundred sixty-seven".