12195826897 has 2 divisors, whose sum is σ = 12195826898. Its totient is φ = 12195826896.

The previous prime is 12195826849. The next prime is 12195826943. The reversal of 12195826897 is 79862859121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9722157201 + 2473669696 = 98601^2 + 49736^2 .

It is an emirp because it is prime and its reverse (79862859121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12195826897 is a prime.

It is not a weakly prime, because it can be changed into another prime (12195826997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097913448 + 6097913449.

It is an arithmetic number, because the mean of its divisors is an integer number (6097913449).

Almost surely, 2^12195826897 is an apocalyptic number.

It is an amenable number.

12195826897 is a deficient number, since it is larger than the sum of its proper divisors (1).

12195826897 is an equidigital number, since it uses as much as digits as its factorization.

12195826897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 58.

The spelling of 12195826897 in words is "twelve billion, one hundred ninety-five million, eight hundred twenty-six thousand, eight hundred ninety-seven".