12908609 has 12 divisors (see below), whose sum is σ = 15138288. Its totient is φ = 10974600.

The previous prime is 12908603. The next prime is 12908611. The reversal of 12908609 is 90680921.

It is not a de Polignac number, because 12908609 - 2¹⁶ = 12843073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12908603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5414 + ... + 7424.

It is an arithmetic number, because the mean of its divisors is an integer number (1261524).

Almost surely, 2^12908609 is an apocalyptic number.

It is an amenable number.

12908609 is a deficient number, since it is larger than the sum of its proper divisors (2229679).

12908609 is a wasteful number, since it uses less digits than its factorization.

12908609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 12908609 is about 3592.8552712293. The cubic root of 12908609 is about 234.5811703854.

The spelling of 12908609 in words is "twelve million, nine hundred eight thousand, six hundred nine".