12989579 has 4 divisors (see below), whose sum is σ = 13306440. Its totient is φ = 12672720.

The previous prime is 12989563. The next prime is 12989591. The reversal of 12989579 is 97598921.

It is a happy number.

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 12989579 - 2⁴ = 12989563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12989519) 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, 158369 + ... + 158450.

It is an arithmetic number, because the mean of its divisors is an integer number (3326610).

Almost surely, 2^12989579 is an apocalyptic number.

12989579 is a deficient number, since it is larger than the sum of its proper divisors (316861).

12989579 is an equidigital number, since it uses as much as digits as its factorization.

12989579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316860.

The product of its digits is 408240, while the sum is 50.

The square root of 12989579 is about 3604.1058530515. The cubic root of 12989579 is about 235.0706231077.

The spelling of 12989579 in words is "twelve million, nine hundred eighty-nine thousand, five hundred seventy-nine".