12916289 has 2 divisors, whose sum is σ = 12916290. Its totient is φ = 12916288.

The previous prime is 12916279. The next prime is 12916313. The reversal of 12916289 is 98261921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 78400 = 3583^2 + 280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12916289 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (12916279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6458144 + 6458145.

It is an arithmetic number, because the mean of its divisors is an integer number (6458145).

Almost surely, 2^12916289 is an apocalyptic number.

It is an amenable number.

12916289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12916289 is an equidigital number, since it uses as much as digits as its factorization.

12916289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 12916289 is about 3593.9239001403. The cubic root of 12916289 is about 234.6276826580.

The spelling of 12916289 in words is "twelve million, nine hundred sixteen thousand, two hundred eighty-nine".