12659609 has 2 divisors, whose sum is σ = 12659610. Its totient is φ = 12659608.

The previous prime is 12659599. The next prime is 12659617. The reversal of 12659609 is 90695621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 78400 = 3547^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 12659609 - 2⁴ = 12659593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12659629) 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, 6329804 + 6329805.

It is an arithmetic number, because the mean of its divisors is an integer number (6329805).

Almost surely, 2^12659609 is an apocalyptic number.

It is an amenable number.

12659609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12659609 is an equidigital number, since it uses as much as digits as its factorization.

12659609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 12659609 is about 3558.0344292882. The cubic root of 12659609 is about 233.0630528024.

The spelling of 12659609 in words is "twelve million, six hundred fifty-nine thousand, six hundred nine".