12308189 has 4 divisors (see below), whose sum is σ = 12372156. Its totient is φ = 12244224.

The previous prime is 12308173. The next prime is 12308201. The reversal of 12308189 is 98180321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1582564 + 10725625 = 1258^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 12308189 - 2⁴ = 12308173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12308089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31694 + ... + 32079.

It is an arithmetic number, because the mean of its divisors is an integer number (3093039).

Almost surely, 2^12308189 is an apocalyptic number.

It is an amenable number.

12308189 is a deficient number, since it is larger than the sum of its proper divisors (63967).

12308189 is an equidigital number, since it uses as much as digits as its factorization.

12308189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63966.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12308189 is about 3508.3028660593. The cubic root of 12308189 is about 230.8862404703.

The spelling of 12308189 in words is "twelve million, three hundred eight thousand, one hundred eighty-nine".