12385431197 has 4 divisors (see below), whose sum is σ = 12399951900. Its totient is φ = 12370910496.

The previous prime is 12385431139. The next prime is 12385431199. The reversal of 12385431197 is 79113458321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79113458321 = 12641 ⋅6258481.

It can be written as a sum of positive squares in 2 ways, for example, as 479566201 + 11905864996 = 21899^2 + 109114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12385431197 - 2⁶ = 12385431133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12385431199) 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 in 3 ways as a sum of consecutive naturals, for example, 7259072 + ... + 7260777.

It is an arithmetic number, because the mean of its divisors is an integer number (3099987975).

Almost surely, 2^12385431197 is an apocalyptic number.

It is an amenable number.

12385431197 is a deficient number, since it is larger than the sum of its proper divisors (14520703).

12385431197 is an equidigital number, since it uses as much as digits as its factorization.

12385431197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14520702.

The product of its digits is 181440, while the sum is 44.

The spelling of 12385431197 in words is "twelve billion, three hundred eighty-five million, four hundred thirty-one thousand, one hundred ninety-seven".