3988667 has 2 divisors, whose sum is σ = 3988668. Its totient is φ = 3988666.

The previous prime is 3988661. The next prime is 3988679. The reversal of 3988667 is 7668893.

It is a weak prime.

It is an emirp because it is prime and its reverse (7668893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3988667 - 2¹⁸ = 3726523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3988661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994333 + 1994334.

It is an arithmetic number, because the mean of its divisors is an integer number (1994334).

Almost surely, 2^3988667 is an apocalyptic number.

3988667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988667 is an equidigital number, since it uses as much as digits as its factorization.

3988667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 3988667 is about 1997.1647403256. The cubic root of 3988667 is about 158.5900465886.

The spelling of 3988667 in words is "three million, nine hundred eighty-eight thousand, six hundred sixty-seven".