12889171 has 2 divisors, whose sum is σ = 12889172. Its totient is φ = 12889170.

The previous prime is 12889169. The next prime is 12889181. The reversal of 12889171 is 17198821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12889171 - 2¹ = 12889169 is a prime.

It is a super-2 number, since 2×12889171² = 332261458134482, which contains 22 as substring.

Together with 12889169, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12889171.

It is not a weakly prime, because it can be changed into another prime (12889181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6444585 + 6444586.

It is an arithmetic number, because the mean of its divisors is an integer number (6444586).

Almost surely, 2^12889171 is an apocalyptic number.

12889171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12889171 is an equidigital number, since it uses as much as digits as its factorization.

12889171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 37.

The square root of 12889171 is about 3590.1491612466. The cubic root of 12889171 is about 234.4633658143.

The spelling of 12889171 in words is "twelve million, eight hundred eighty-nine thousand, one hundred seventy-one".