12817213 has 2 divisors, whose sum is σ = 12817214. Its totient is φ = 12817212.

The previous prime is 12817177. The next prime is 12817307. The reversal of 12817213 is 31271821.

It is a happy number.

12817213 is digitally balanced in base 3, 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., 12802084 + 15129 = 3578^2 + 123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12817213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12877213) 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, 6408606 + 6408607.

It is an arithmetic number, because the mean of its divisors is an integer number (6408607).

Almost surely, 2^12817213 is an apocalyptic number.

It is an amenable number.

12817213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12817213 is an equidigital number, since it uses as much as digits as its factorization.

12817213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 12817213 is about 3580.1135456854. The cubic root of 12817213 is about 234.0262285841.

The spelling of 12817213 in words is "twelve million, eight hundred seventeen thousand, two hundred thirteen".