12432440197 has 2 divisors, whose sum is σ = 12432440198. Its totient is φ = 12432440196.

The previous prime is 12432440177. The next prime is 12432440233. The reversal of 12432440197 is 79104423421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7990750881 + 4441689316 = 89391^2 + 66646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12432440197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12432440177) 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, 6216220098 + 6216220099.

It is an arithmetic number, because the mean of its divisors is an integer number (6216220099).

Almost surely, 2^12432440197 is an apocalyptic number.

It is an amenable number.

12432440197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12432440197 is an equidigital number, since it uses as much as digits as its factorization.

12432440197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 12432440197 in words is "twelve billion, four hundred thirty-two million, four hundred forty thousand, one hundred ninety-seven".