12005989 has 8 divisors (see below), whose sum is σ = 12422592. Its totient is φ = 11595360.

The previous prime is 12005963. The next prime is 12006017. The reversal of 12005989 is 98950021.

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 12005989 - 2⁵ = 12005957 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 (12005909) 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, 2802 + ... + 5644.

It is an arithmetic number, because the mean of its divisors is an integer number (1552824).

Almost surely, 2^12005989 is an apocalyptic number.

It is an amenable number.

12005989 is a deficient number, since it is larger than the sum of its proper divisors (416603).

12005989 is a wasteful number, since it uses less digits than its factorization.

12005989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 12005989 is about 3464.9659449986. The cubic root of 12005989 is about 228.9809293629.

The spelling of 12005989 in words is "twelve million, five thousand, nine hundred eighty-nine".