12608979 has 4 divisors (see below), whose sum is σ = 16811976. Its totient is φ = 8405984.

The previous prime is 12608977. The next prime is 12608983. The reversal of 12608979 is 97980621.

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

It is a cyclic number.

It is not a de Polignac number, because 12608979 - 2¹ = 12608977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12608979.

It is not an unprimeable number, because it can be changed into a prime (12608977) 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, 2101494 + ... + 2101499.

It is an arithmetic number, because the mean of its divisors is an integer number (4202994).

Almost surely, 2^12608979 is an apocalyptic number.

12608979 is a deficient number, since it is larger than the sum of its proper divisors (4202997).

12608979 is an equidigital number, since it uses as much as digits as its factorization.

12608979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202996.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12608979 is about 3550.9124179568. The cubic root of 12608979 is about 232.7519387151.

The spelling of 12608979 in words is "twelve million, six hundred eight thousand, nine hundred seventy-nine".