12197879 has 2 divisors, whose sum is σ = 12197880. Its totient is φ = 12197878.

The previous prime is 12197851. The next prime is 12197903. The reversal of 12197879 is 97879121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12197879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12197839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098939 + 6098940.

It is an arithmetic number, because the mean of its divisors is an integer number (6098940).

Almost surely, 2^12197879 is an apocalyptic number.

12197879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197879 is an equidigital number, since it uses as much as digits as its factorization.

12197879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 12197879 is about 3492.5462058504. The cubic root of 12197879 is about 230.1944102952.

The spelling of 12197879 in words is "twelve million, one hundred ninety-seven thousand, eight hundred seventy-nine".