12168989 has 4 divisors (see below), whose sum is σ = 13907424. Its totient is φ = 10430556.

The previous prime is 12168973. The next prime is 12169037. The reversal of 12168989 is 98986121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12168989 - 2⁴ = 12168973 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 (12168929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869207 + ... + 869220.

It is an arithmetic number, because the mean of its divisors is an integer number (3476856).

Almost surely, 2^12168989 is an apocalyptic number.

It is an amenable number.

12168989 is a deficient number, since it is larger than the sum of its proper divisors (1738435).

12168989 is an equidigital number, since it uses as much as digits as its factorization.

12168989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738434.

The product of its digits is 62208, while the sum is 44.

The square root of 12168989 is about 3488.4078029955. The cubic root of 12168989 is about 230.0125323984.

The spelling of 12168989 in words is "twelve million, one hundred sixty-eight thousand, nine hundred eighty-nine".