12663289 has 4 divisors (see below), whose sum is σ = 12671140. Its totient is φ = 12655440.

The previous prime is 12663281. The next prime is 12663311. The reversal of 12663289 is 98236621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1937664 + 10725625 = 1392^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 12663289 - 2³ = 12663281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12663281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522 + ... + 5059.

It is an arithmetic number, because the mean of its divisors is an integer number (3167785).

Almost surely, 2^12663289 is an apocalyptic number.

It is an amenable number.

12663289 is a deficient number, since it is larger than the sum of its proper divisors (7851).

12663289 is an equidigital number, since it uses as much as digits as its factorization.

12663289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850.

The product of its digits is 31104, while the sum is 37.

The square root of 12663289 is about 3558.5515311711. The cubic root of 12663289 is about 233.0856335141.

The spelling of 12663289 in words is "twelve million, six hundred sixty-three thousand, two hundred eighty-nine".