12647979 has 12 divisors (see below), whose sum is σ = 18501600. Its totient is φ = 8324784.

The previous prime is 12647959. The next prime is 12647989. The reversal of 12647979 is 97974621.

It is not a de Polignac number, because 12647979 - 2¹¹ = 12645931 is a prime.

12647979 is a modest number, since divided by 7979 gives 1264 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12647909) 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 11 ways as a sum of consecutive naturals, for example, 8184 + ... + 9605.

It is an arithmetic number, because the mean of its divisors is an integer number (1541800).

Almost surely, 2^12647979 is an apocalyptic number.

12647979 is a deficient number, since it is larger than the sum of its proper divisors (5853621).

12647979 is a wasteful number, since it uses less digits than its factorization.

12647979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17874 (or 17871 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 12647979 is about 3556.3997244404. The cubic root of 12647979 is about 232.9916616098.

The spelling of 12647979 in words is "twelve million, six hundred forty-seven thousand, nine hundred seventy-nine".