12162989 has 4 divisors (see below), whose sum is σ = 12421824. Its totient is φ = 11904156.

The previous prime is 12162971. The next prime is 12162991. The reversal of 12162989 is 98926121.

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: 98926121 = 7 ⋅14132303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12162989 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 (12162959) 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, 129347 + ... + 129440.

It is an arithmetic number, because the mean of its divisors is an integer number (3105456).

Almost surely, 2^12162989 is an apocalyptic number.

It is an amenable number.

12162989 is a deficient number, since it is larger than the sum of its proper divisors (258835).

12162989 is an equidigital number, since it uses as much as digits as its factorization.

12162989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258834.

The product of its digits is 15552, while the sum is 38.

The square root of 12162989 is about 3487.5477057669. The cubic root of 12162989 is about 229.9747231201.

The spelling of 12162989 in words is "twelve million, one hundred sixty-two thousand, nine hundred eighty-nine".