12884309 has 2 divisors, whose sum is σ = 12884310. Its totient is φ = 12884308.

The previous prime is 12884279. The next prime is 12884321. The reversal of 12884309 is 90348821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 103684 = 3575^2 + 322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12884309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12884329) 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, 6442154 + 6442155.

It is an arithmetic number, because the mean of its divisors is an integer number (6442155).

Almost surely, 2^12884309 is an apocalyptic number.

It is an amenable number.

12884309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12884309 is an equidigital number, since it uses as much as digits as its factorization.

12884309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 12884309 is about 3589.4719667383. The cubic root of 12884309 is about 234.4338810049.

The spelling of 12884309 in words is "twelve million, eight hundred eighty-four thousand, three hundred nine".