12647879 has 4 divisors (see below), whose sum is σ = 12790080. Its totient is φ = 12505680.

The previous prime is 12647849. The next prime is 12647897. The reversal of 12647879 is 97874621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97874621 = 13 ⋅7528817.

It is a cyclic number.

It is not a de Polignac number, because 12647879 - 2¹² = 12643783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70967 + ... + 71144.

It is an arithmetic number, because the mean of its divisors is an integer number (3197520).

Almost surely, 2^12647879 is an apocalyptic number.

12647879 is a deficient number, since it is larger than the sum of its proper divisors (142201).

12647879 is an equidigital number, since it uses as much as digits as its factorization.

12647879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142200.

The product of its digits is 169344, while the sum is 44.

The square root of 12647879 is about 3556.3856652506. The cubic root of 12647879 is about 232.9910475663.

The spelling of 12647879 in words is "twelve million, six hundred forty-seven thousand, eight hundred seventy-nine".