12319871957 has 4 divisors (see below), whose sum is σ = 12320367756. Its totient is φ = 12319376160.

The previous prime is 12319871939. The next prime is 12319871989. The reversal of 12319871957 is 75917891321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2527977841 + 9791894116 = 50279^2 + 98954^2 .

It is a cyclic number.

It is not a de Polignac number, because 12319871957 - 2⁸ = 12319871701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12319871899 and 12319871908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12319871917) 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, 208544 + ... + 261017.

It is an arithmetic number, because the mean of its divisors is an integer number (3080091939).

Almost surely, 2^12319871957 is an apocalyptic number.

It is an amenable number.

12319871957 is a deficient number, since it is larger than the sum of its proper divisors (495799).

12319871957 is an equidigital number, since it uses as much as digits as its factorization.

12319871957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495798.

The product of its digits is 952560, while the sum is 53.

The spelling of 12319871957 in words is "twelve billion, three hundred nineteen million, eight hundred seventy-one thousand, nine hundred fifty-seven".