12191297 has 2 divisors, whose sum is σ = 12191298. Its totient is φ = 12191296.

The previous prime is 12191279. The next prime is 12191299. The reversal of 12191297 is 79219121.

Together with previous prime (12191279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7311616 + 4879681 = 2704^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 12191297 - 2⁶ = 12191233 is a prime.

Together with 12191299, 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 (12191299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095648 + 6095649.

It is an arithmetic number, because the mean of its divisors is an integer number (6095649).

Almost surely, 2^12191297 is an apocalyptic number.

It is an amenable number.

12191297 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191297 is an equidigital number, since it uses as much as digits as its factorization.

12191297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 12191297 is about 3491.6037862278. The cubic root of 12191297 is about 230.1529983903.

The spelling of 12191297 in words is "twelve million, one hundred ninety-one thousand, two hundred ninety-seven".