8163191 has 2 divisors, whose sum is σ = 8163192. Its totient is φ = 8163190.

The previous prime is 8163143. The next prime is 8163193. The reversal of 8163191 is 1913618.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8163191 is a prime.

It is a Sophie Germain prime.

Together with 8163193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8163193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4081595 + 4081596.

It is an arithmetic number, because the mean of its divisors is an integer number (4081596).

Almost surely, 2^8163191 is an apocalyptic number.

8163191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8163191 is an equidigital number, since it uses as much as digits as its factorization.

8163191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 29.

The square root of 8163191 is about 2857.1298535418. The cubic root of 8163191 is about 201.3507814092.

The spelling of 8163191 in words is "eight million, one hundred sixty-three thousand, one hundred ninety-one".