3998171 has 2 divisors, whose sum is σ = 3998172. Its totient is φ = 3998170.

The previous prime is 3998131. The next prime is 3998173. The reversal of 3998171 is 1718993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3998171 - 2⁶ = 3998107 is a prime.

Together with 3998173, 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 (3998173) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999085 + 1999086.

It is an arithmetic number, because the mean of its divisors is an integer number (1999086).

Almost surely, 2^3998171 is an apocalyptic number.

3998171 is a deficient number, since it is larger than the sum of its proper divisors (1).

3998171 is an equidigital number, since it uses as much as digits as its factorization.

3998171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 3998171 is about 1999.5426977187. The cubic root of 3998171 is about 158.7159068705.

The spelling of 3998171 in words is "three million, nine hundred ninety-eight thousand, one hundred seventy-one".