12607989 has 4 divisors (see below), whose sum is σ = 16810656. Its totient is φ = 8405324.

The previous prime is 12607939. The next prime is 12608017. The reversal of 12607989 is 98970621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98970621 = 3 ⋅32990207.

It is a cyclic number.

It is not a de Polignac number, because 12607989 - 2⁹ = 12607477 is a prime.

It is a super-2 number, since 2×12607989² = 317922773248242, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12607989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12607909) 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, 2101329 + ... + 2101334.

It is an arithmetic number, because the mean of its divisors is an integer number (4202664).

Almost surely, 2^12607989 is an apocalyptic number.

It is an amenable number.

12607989 is a deficient number, since it is larger than the sum of its proper divisors (4202667).

12607989 is an equidigital number, since it uses as much as digits as its factorization.

12607989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202666.

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

The square root of 12607989 is about 3550.7730144294. The cubic root of 12607989 is about 232.7458470125.

The spelling of 12607989 in words is "twelve million, six hundred seven thousand, nine hundred eighty-nine".