12812379857 has 2 divisors, whose sum is σ = 12812379858. Its totient is φ = 12812379856.

The previous prime is 12812379847. The next prime is 12812379859. The reversal of 12812379857 is 75897321821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7807666321 + 5004713536 = 88361^2 + 70744^2 .

It is a cyclic number.

It is not a de Polignac number, because 12812379857 - 2²² = 12808185553 is a prime.

Together with 12812379859, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12812379799 and 12812379808.

It is not a weakly prime, because it can be changed into another prime (12812379859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406189928 + 6406189929.

It is an arithmetic number, because the mean of its divisors is an integer number (6406189929).

Almost surely, 2^12812379857 is an apocalyptic number.

It is an amenable number.

12812379857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12812379857 is an equidigital number, since it uses as much as digits as its factorization.

12812379857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 53.

The spelling of 12812379857 in words is "twelve billion, eight hundred twelve million, three hundred seventy-nine thousand, eight hundred fifty-seven".