12947579 has 4 divisors (see below), whose sum is σ = 13027176. Its totient is φ = 12867984.

The previous prime is 12947573. The next prime is 12947587. The reversal of 12947579 is 97574921.

12947579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97574921 = 3697 ⋅26393.

It is a cyclic number.

It is not a de Polignac number, because 12947579 - 2⁴ = 12947563 is a prime.

It is a super-2 number, since 2×12947579² = 335279603922482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12947573) 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, 39554 + ... + 39879.

It is an arithmetic number, because the mean of its divisors is an integer number (3256794).

Almost surely, 2^12947579 is an apocalyptic number.

12947579 is a deficient number, since it is larger than the sum of its proper divisors (79597).

12947579 is an equidigital number, since it uses as much as digits as its factorization.

12947579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79596.

The product of its digits is 158760, while the sum is 44.

The square root of 12947579 is about 3598.2744475651. The cubic root of 12947579 is about 234.8169934794.

The spelling of 12947579 in words is "twelve million, nine hundred forty-seven thousand, five hundred seventy-nine".