2191169 has 2 divisors, whose sum is σ = 2191170. Its totient is φ = 2191168.

The previous prime is 2191159. The next prime is 2191171. The reversal of 2191169 is 9611912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 44944 = 1465^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 2191169 - 2²⁰ = 1142593 is a prime.

It is a super-2 number, since 2×2191169² = 9602443173122, which contains 22 as substring.

Together with 2191171, 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 (2191159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095584 + 1095585.

It is an arithmetic number, because the mean of its divisors is an integer number (1095585).

2^2191169 is an apocalyptic number.

It is an amenable number.

2191169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191169 is an equidigital number, since it uses as much as digits as its factorization.

2191169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 29.

The square root of 2191169 is about 1480.2597744991. The cubic root of 2191169 is about 129.8848882396.

The spelling of 2191169 in words is "two million, one hundred ninety-one thousand, one hundred sixty-nine".