12919773887 has 2 divisors, whose sum is σ = 12919773888. Its totient is φ = 12919773886.

The previous prime is 12919773857. The next prime is 12919773899. The reversal of 12919773887 is 78837791921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12919773887 - 2²⁰ = 12918725311 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459886943 + 6459886944.

It is an arithmetic number, because the mean of its divisors is an integer number (6459886944).

Almost surely, 2^12919773887 is an apocalyptic number.

12919773887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919773887 is an equidigital number, since it uses as much as digits as its factorization.

12919773887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 62.

The spelling of 12919773887 in words is "twelve billion, nine hundred nineteen million, seven hundred seventy-three thousand, eight hundred eighty-seven".