12809611 has 2 divisors, whose sum is σ = 12809612. Its totient is φ = 12809610.

The previous prime is 12809609. The next prime is 12809627. The reversal of 12809611 is 11690821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12809611 - 2¹ = 12809609 is a prime.

It is a super-2 number, since 2×12809611² = 328172267942642, which contains 22 as substring.

Together with 12809609, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12809611.

It is not a weakly prime, because it can be changed into another prime (12809711) 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, 6404805 + 6404806.

It is an arithmetic number, because the mean of its divisors is an integer number (6404806).

Almost surely, 2^12809611 is an apocalyptic number.

12809611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809611 is an equidigital number, since it uses as much as digits as its factorization.

12809611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12809611 is about 3579.0516900430. The cubic root of 12809611 is about 233.9799517730.

The spelling of 12809611 in words is "twelve million, eight hundred nine thousand, six hundred eleven".