12919773857 has 2 divisors, whose sum is σ = 12919773858. Its totient is φ = 12919773856.

The previous prime is 12919773817. The next prime is 12919773887. The reversal of 12919773857 is 75837791921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11278227601 + 1641546256 = 106199^2 + 40516^2 .

It is a cyclic number.

It is not a de Polignac number, because 12919773857 - 2¹⁸ = 12919511713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12919773796 and 12919773805.

It is not a weakly prime, because it can be changed into another prime (12919773817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459886928 + 6459886929.

It is an arithmetic number, because the mean of its divisors is an integer number (6459886929).

Almost surely, 2^12919773857 is an apocalyptic number.

It is an amenable number.

12919773857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919773857 is an equidigital number, since it uses as much as digits as its factorization.

12919773857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 59.

The spelling of 12919773857 in words is "twelve billion, nine hundred nineteen million, seven hundred seventy-three thousand, eight hundred fifty-seven".