12305989 has 8 divisors (see below), whose sum is σ = 12879360. Its totient is φ = 11735856.

The previous prime is 12305987. The next prime is 12306001. The reversal of 12305989 is 98950321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12305989 - 2¹ = 12305987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10459 + ... + 11575.

It is an arithmetic number, because the mean of its divisors is an integer number (1609920).

Almost surely, 2^12305989 is an apocalyptic number.

It is an amenable number.

12305989 is a deficient number, since it is larger than the sum of its proper divisors (573371).

12305989 is a wasteful number, since it uses less digits than its factorization.

12305989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 12305989 is about 3507.9893101319. The cubic root of 12305989 is about 230.8724832339.

The spelling of 12305989 in words is "twelve million, three hundred five thousand, nine hundred eighty-nine".