8191193 has 2 divisors, whose sum is σ = 8191194. Its totient is φ = 8191192.

The previous prime is 8191189. The next prime is 8191217. The reversal of 8191193 is 3911918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8111104 + 80089 = 2848^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 8191193 - 2² = 8191189 is a prime.

It is not a weakly prime, because it can be changed into another prime (8191123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4095596 + 4095597.

It is an arithmetic number, because the mean of its divisors is an integer number (4095597).

Almost surely, 2^8191193 is an apocalyptic number.

It is an amenable number.

8191193 is a deficient number, since it is larger than the sum of its proper divisors (1).

8191193 is an equidigital number, since it uses as much as digits as its factorization.

8191193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 32.

The square root of 8191193 is about 2862.0260306294. The cubic root of 8191193 is about 201.5807482587.

Subtracting from 8191193 its reverse (3911918), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 8191193 in words is "eight million, one hundred ninety-one thousand, one hundred ninety-three".