12647213 has 2 divisors, whose sum is σ = 12647214. Its totient is φ = 12647212.

The previous prime is 12647197. The next prime is 12647221. The reversal of 12647213 is 31274621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 1444804 = 3347^2 + 1202^2 .

It is a cyclic number.

It is not a de Polignac number, because 12647213 - 2⁴ = 12647197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12647233) 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, 6323606 + 6323607.

It is an arithmetic number, because the mean of its divisors is an integer number (6323607).

Almost surely, 2^12647213 is an apocalyptic number.

It is an amenable number.

12647213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12647213 is an equidigital number, since it uses as much as digits as its factorization.

12647213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 12647213 is about 3556.2920296286. The cubic root of 12647213 is about 232.9869579541.

The spelling of 12647213 in words is "twelve million, six hundred forty-seven thousand, two hundred thirteen".