12327989 has 4 divisors (see below), whose sum is σ = 12342924. Its totient is φ = 12313056.

The previous prime is 12327949. The next prime is 12328007. The reversal of 12327989 is 98972321.

It is a happy number.

12327989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98972321 = 7 ⋅14138903.

It can be written as a sum of positive squares in 2 ways, for example, as 4765489 + 7562500 = 2183^2 + 2750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12327989 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 (12327949) 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, 6152 + ... + 7905.

It is an arithmetic number, because the mean of its divisors is an integer number (3085731).

Almost surely, 2^12327989 is an apocalyptic number.

It is an amenable number.

12327989 is a deficient number, since it is larger than the sum of its proper divisors (14935).

12327989 is an equidigital number, since it uses as much as digits as its factorization.

12327989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14934.

The product of its digits is 54432, while the sum is 41.

The square root of 12327989 is about 3511.1236093308. The cubic root of 12327989 is about 231.0099818903.

The spelling of 12327989 in words is "twelve million, three hundred twenty-seven thousand, nine hundred eighty-nine".