12710809 has 2 divisors, whose sum is σ = 12710810. Its totient is φ = 12710808.

The previous prime is 12710807. The next prime is 12710813. The reversal of 12710809 is 90801721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12581209 + 129600 = 3547^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 12710809 - 2¹ = 12710807 is a prime.

Together with 12710807, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12710807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6355404 + 6355405.

It is an arithmetic number, because the mean of its divisors is an integer number (6355405).

Almost surely, 2^12710809 is an apocalyptic number.

It is an amenable number.

12710809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12710809 is an equidigital number, since it uses as much as digits as its factorization.

12710809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 12710809 is about 3565.2221529661. Note that the first 3 decimals coincide. The cubic root of 12710809 is about 233.3768270396.

The spelling of 12710809 in words is "twelve million, seven hundred ten thousand, eight hundred nine".