12617579 has 4 divisors (see below), whose sum is σ = 13588176. Its totient is φ = 11646984.

The previous prime is 12617569. The next prime is 12617597. The reversal of 12617579 is 97571621.

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-12617579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12617509) 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, 485279 + ... + 485304.

It is an arithmetic number, because the mean of its divisors is an integer number (3397044).

Almost surely, 2^12617579 is an apocalyptic number.

12617579 is a deficient number, since it is larger than the sum of its proper divisors (970597).

12617579 is an equidigital number, since it uses as much as digits as its factorization.

12617579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970596.

The product of its digits is 26460, while the sum is 38.

The square root of 12617579 is about 3552.1231679096. The cubic root of 12617579 is about 232.8048431246.

The spelling of 12617579 in words is "twelve million, six hundred seventeen thousand, five hundred seventy-nine".