12908289 has 4 divisors (see below), whose sum is σ = 17211056. Its totient is φ = 8605524.

The previous prime is 12908279. The next prime is 12908323. The reversal of 12908289 is 98280921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12908289 - 2¹¹ = 12906241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12908209) 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 in 3 ways as a sum of consecutive naturals, for example, 2151379 + ... + 2151384.

It is an arithmetic number, because the mean of its divisors is an integer number (4302764).

Almost surely, 2^12908289 is an apocalyptic number.

It is an amenable number.

12908289 is a deficient number, since it is larger than the sum of its proper divisors (4302767).

12908289 is an equidigital number, since it uses as much as digits as its factorization.

12908289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302766.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 12908289 is about 3592.8107381269. The cubic root of 12908289 is about 234.5792319738.

The spelling of 12908289 in words is "twelve million, nine hundred eight thousand, two hundred eighty-nine".