12966817 has 2 divisors, whose sum is σ = 12966818. Its totient is φ = 12966816.

The previous prime is 12966809. The next prime is 12966847. The reversal of 12966817 is 71866921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11451456 + 1515361 = 3384^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 12966817 - 2³ = 12966809 is a prime.

It is a super-2 number, since 2×12966817² = 336276686222978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12966817.

It is not a weakly prime, because it can be changed into another prime (12966847) 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, 6483408 + 6483409.

It is an arithmetic number, because the mean of its divisors is an integer number (6483409).

Almost surely, 2^12966817 is an apocalyptic number.

It is an amenable number.

12966817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12966817 is an equidigital number, since it uses as much as digits as its factorization.

12966817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 12966817 is about 3600.9466810826. The cubic root of 12966817 is about 234.9332359004.

The spelling of 12966817 in words is "twelve million, nine hundred sixty-six thousand, eight hundred seventeen".