12017867 has 2 divisors, whose sum is σ = 12017868. Its totient is φ = 12017866.

The previous prime is 12017843. The next prime is 12017897. The reversal of 12017867 is 76871021.

It is a weak prime.

It is an emirp because it is prime and its reverse (76871021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12017867 - 2²⁰ = 10969291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12017807) 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, 6008933 + 6008934.

It is an arithmetic number, because the mean of its divisors is an integer number (6008934).

Almost surely, 2^12017867 is an apocalyptic number.

12017867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12017867 is an equidigital number, since it uses as much as digits as its factorization.

12017867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 12017867 is about 3466.6795352325. The cubic root of 12017867 is about 229.0564177719.

Adding to 12017867 its reverse (76871021), we get a palindrome (88888888).

The spelling of 12017867 in words is "twelve million, seventeen thousand, eight hundred sixty-seven".