12809567213 has 2 divisors, whose sum is σ = 12809567214. Its totient is φ = 12809567212.

The previous prime is 12809567161. The next prime is 12809567263. The reversal of 12809567213 is 31276590821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11080088644 + 1729478569 = 105262^2 + 41587^2 .

It is a cyclic number.

It is not a de Polignac number, because 12809567213 - 2⁶ = 12809567149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12809567263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404783606 + 6404783607.

It is an arithmetic number, because the mean of its divisors is an integer number (6404783607).

Almost surely, 2^12809567213 is an apocalyptic number.

It is an amenable number.

12809567213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12809567213 is an equidigital number, since it uses as much as digits as its factorization.

12809567213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 12809567213 in words is "twelve billion, eight hundred nine million, five hundred sixty-seven thousand, two hundred thirteen".