12691169 has 2 divisors, whose sum is σ = 12691170. Its totient is φ = 12691168.

The previous prime is 12691109. The next prime is 12691171. The reversal of 12691169 is 96119621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8196769 + 4494400 = 2863^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 12691169 - 2⁸ = 12690913 is a prime.

It is a super-2 number, since 2×12691169² = 322131541173122, which contains 22 as substring.

Together with 12691171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12691109) 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, 6345584 + 6345585.

It is an arithmetic number, because the mean of its divisors is an integer number (6345585).

Almost surely, 2^12691169 is an apocalyptic number.

It is an amenable number.

12691169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691169 is an equidigital number, since it uses as much as digits as its factorization.

12691169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 35.

The square root of 12691169 is about 3562.4667015988. The cubic root of 12691169 is about 233.2565649949.

The spelling of 12691169 in words is "twelve million, six hundred ninety-one thousand, one hundred sixty-nine".