12797809 has 2 divisors, whose sum is σ = 12797810. Its totient is φ = 12797808.

The previous prime is 12797801. The next prime is 12797833. The reversal of 12797809 is 90879721.

It is a happy number.

12797809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9168784 + 3629025 = 3028^2 + 1905^2 .

It is an emirp because it is prime and its reverse (90879721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12797809 - 2³ = 12797801 is a prime.

It is not a weakly prime, because it can be changed into another prime (12797801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6398904 + 6398905.

It is an arithmetic number, because the mean of its divisors is an integer number (6398905).

Almost surely, 2^12797809 is an apocalyptic number.

It is an amenable number.

12797809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12797809 is an equidigital number, since it uses as much as digits as its factorization.

12797809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 12797809 is about 3577.4025493366. The cubic root of 12797809 is about 233.9080713728.

The spelling of 12797809 in words is "twelve million, seven hundred ninety-seven thousand, eight hundred nine".