12423931197 has 4 divisors (see below), whose sum is σ = 16565241600. Its totient is φ = 8282620796.

The previous prime is 12423931193. The next prime is 12423931207. The reversal of 12423931197 is 79113932421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12423931197 - 2² = 12423931193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423931193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070655197 + ... + 2070655202.

It is an arithmetic number, because the mean of its divisors is an integer number (4141310400).

Almost surely, 2^12423931197 is an apocalyptic number.

It is an amenable number.

12423931197 is a deficient number, since it is larger than the sum of its proper divisors (4141310403).

12423931197 is an equidigital number, since it uses as much as digits as its factorization.

12423931197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141310402.

The product of its digits is 81648, while the sum is 42.

The spelling of 12423931197 in words is "twelve billion, four hundred twenty-three million, nine hundred thirty-one thousand, one hundred ninety-seven".