12630809 has 2 divisors, whose sum is σ = 12630810. Its totient is φ = 12630808.

The previous prime is 12630799. The next prime is 12630817. The reversal of 12630809 is 90803621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10259209 + 2371600 = 3203^2 + 1540^2 .

It is an emirp because it is prime and its reverse (90803621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12630809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12630869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6315404 + 6315405.

It is an arithmetic number, because the mean of its divisors is an integer number (6315405).

Almost surely, 2^12630809 is an apocalyptic number.

It is an amenable number.

12630809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12630809 is an equidigital number, since it uses as much as digits as its factorization.

12630809 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 29.

The square root of 12630809 is about 3553.9849465072. The cubic root of 12630809 is about 232.8861828756.

The spelling of 12630809 in words is "twelve million, six hundred thirty thousand, eight hundred nine".