12919773869 has 4 divisors (see below), whose sum is σ = 13336540800. Its totient is φ = 12503006940.

The previous prime is 12919773857. The next prime is 12919773887. The reversal of 12919773869 is 96837791921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96837791921 = 13 ⋅7449060917.

It is a cyclic number.

It is not a de Polignac number, because 12919773869 - 2⁸ = 12919773613 is a prime.

It is a super-2 number, since 2×12919773869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12919773899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208383419 + ... + 208383480.

It is an arithmetic number, because the mean of its divisors is an integer number (3334135200).

Almost surely, 2^12919773869 is an apocalyptic number.

It is an amenable number.

12919773869 is a deficient number, since it is larger than the sum of its proper divisors (416766931).

12919773869 is an equidigital number, since it uses as much as digits as its factorization.

12919773869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416766930.

The product of its digits is 10287648, while the sum is 62.

The spelling of 12919773869 in words is "twelve billion, nine hundred nineteen million, seven hundred seventy-three thousand, eight hundred sixty-nine".