12809129 has 2 divisors, whose sum is σ = 12809130. Its totient is φ = 12809128.

The previous prime is 12809119. The next prime is 12809131. The reversal of 12809129 is 92190821.

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., 10627600 + 2181529 = 3260^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 12809129 - 2¹² = 12805033 is a prime.

It is a Sophie Germain prime.

Together with 12809131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12809095 and 12809104.

It is not a weakly prime, because it can be changed into another prime (12809119) 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, 6404564 + 6404565.

It is an arithmetic number, because the mean of its divisors is an integer number (6404565).

Almost surely, 2^12809129 is an apocalyptic number.

It is an amenable number.

12809129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809129 is an equidigital number, since it uses as much as digits as its factorization.

12809129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 12809129 is about 3578.9843531371. The cubic root of 12809129 is about 233.9770170039.

The spelling of 12809129 in words is "twelve million, eight hundred nine thousand, one hundred twenty-nine".