12809317 has 2 divisors, whose sum is σ = 12809318. Its totient is φ = 12809316.

The previous prime is 12809299. The next prime is 12809327. The reversal of 12809317 is 71390821.

12809317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11249316 + 1560001 = 3354^2 + 1249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12809317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12809327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404658 + 6404659.

It is an arithmetic number, because the mean of its divisors is an integer number (6404659).

Almost surely, 2^12809317 is an apocalyptic number.

It is an amenable number.

12809317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809317 is an equidigital number, since it uses as much as digits as its factorization.

12809317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 12809317 is about 3579.0106174752. The cubic root of 12809317 is about 233.9781616944.

The spelling of 12809317 in words is "twelve million, eight hundred nine thousand, three hundred seventeen".