12327661 has 2 divisors, whose sum is σ = 12327662. Its totient is φ = 12327660.

The previous prime is 12327649. The next prime is 12327691. The reversal of 12327661 is 16672321.

12327661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11095561 + 1232100 = 3331^2 + 1110^2 .

It is an emirp because it is prime and its reverse (16672321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12327661 - 2⁵ = 12327629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12327631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6163830 + 6163831.

It is an arithmetic number, because the mean of its divisors is an integer number (6163831).

Almost surely, 2^12327661 is an apocalyptic number.

It is an amenable number.

12327661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12327661 is an equidigital number, since it uses as much as digits as its factorization.

12327661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 12327661 is about 3511.0769003256. The cubic root of 12327661 is about 231.0079331121.

Adding to 12327661 its reverse (16672321), we get a palindrome (28999982).

The spelling of 12327661 in words is "twelve million, three hundred twenty-seven thousand, six hundred sixty-one".