12663689 has 2 divisors, whose sum is σ = 12663690. Its totient is φ = 12663688.

The previous prime is 12663653. The next prime is 12663697. The reversal of 12663689 is 98636621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 795664 = 3445^2 + 892^2 .

It is an emirp because it is prime and its reverse (98636621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12663689 - 2⁸ = 12663433 is a prime.

It is not a weakly prime, because it can be changed into another prime (12663619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331844 + 6331845.

It is an arithmetic number, because the mean of its divisors is an integer number (6331845).

Almost surely, 2^12663689 is an apocalyptic number.

It is an amenable number.

12663689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12663689 is an equidigital number, since it uses as much as digits as its factorization.

12663689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 12663689 is about 3558.6077333699. The cubic root of 12663689 is about 233.0880876756.

The spelling of 12663689 in words is "twelve million, six hundred sixty-three thousand, six hundred eighty-nine".