12809647 has 2 divisors, whose sum is σ = 12809648. Its totient is φ = 12809646.

The previous prime is 12809633. The next prime is 12809701. The reversal of 12809647 is 74690821.

12809647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12809647 - 2¹⁵ = 12776879 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 (12809627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404823 + 6404824.

It is an arithmetic number, because the mean of its divisors is an integer number (6404824).

Almost surely, 2^12809647 is an apocalyptic number.

12809647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809647 is an equidigital number, since it uses as much as digits as its factorization.

12809647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 12809647 is about 3579.0567193047. The cubic root of 12809647 is about 233.9801709644.

It can be divided in two parts, 12809 and 647, that added together give a square (13456 = 116²).

The spelling of 12809647 in words is "twelve million, eight hundred nine thousand, six hundred forty-seven".