11982197 has 2 divisors, whose sum is σ = 11982198. Its totient is φ = 11982196.

The previous prime is 11982163. The next prime is 11982199. The reversal of 11982197 is 79128911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8916196 + 3066001 = 2986^2 + 1751^2 .

It is an emirp because it is prime and its reverse (79128911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11982197 - 2⁸ = 11981941 is a prime.

Together with 11982199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11982197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11982199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991098 + 5991099.

It is an arithmetic number, because the mean of its divisors is an integer number (5991099).

Almost surely, 2^11982197 is an apocalyptic number.

It is an amenable number.

11982197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982197 is an equidigital number, since it uses as much as digits as its factorization.

11982197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 38.

The square root of 11982197 is about 3461.5310196501. The cubic root of 11982197 is about 228.8295738766.

The spelling of 11982197 in words is "eleven million, nine hundred eighty-two thousand, one hundred ninety-seven".