12871979 has 4 divisors (see below), whose sum is σ = 12913680. Its totient is φ = 12830280.

The previous prime is 12871933. The next prime is 12872003. The reversal of 12871979 is 97917821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12871979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12876979) 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 in 3 ways as a sum of consecutive naturals, for example, 20384 + ... + 21005.

It is an arithmetic number, because the mean of its divisors is an integer number (3228420).

Almost surely, 2^12871979 is an apocalyptic number.

12871979 is a deficient number, since it is larger than the sum of its proper divisors (41701).

12871979 is an equidigital number, since it uses as much as digits as its factorization.

12871979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41700.

The product of its digits is 63504, while the sum is 44.

The square root of 12871979 is about 3587.7540328177. The cubic root of 12871979 is about 234.3590744498.

The spelling of 12871979 in words is "twelve million, eight hundred seventy-one thousand, nine hundred seventy-nine".