12213647 has 2 divisors, whose sum is σ = 12213648. Its totient is φ = 12213646.

The previous prime is 12213629. The next prime is 12213661. The reversal of 12213647 is 74631221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12213647 - 2⁶ = 12213583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12213347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106823 + 6106824.

It is an arithmetic number, because the mean of its divisors is an integer number (6106824).

Almost surely, 2^12213647 is an apocalyptic number.

12213647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213647 is an equidigital number, since it uses as much as digits as its factorization.

12213647 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 12213647 is about 3494.8028556701. The cubic root of 12213647 is about 230.2935571104.

Adding to 12213647 its reverse (74631221), we get a palindrome (86844868).

The spelling of 12213647 in words is "twelve million, two hundred thirteen thousand, six hundred forty-seven".