12891163 has 4 divisors (see below), whose sum is σ = 12958848. Its totient is φ = 12823480.

The previous prime is 12891157. The next prime is 12891173. The reversal of 12891163 is 36119821.

12891163 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36119821 = 23 ⋅1570427.

It is a cyclic number.

It is not a de Polignac number, because 12891163 - 2¹⁷ = 12760091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12891173) 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 in 3 ways as a sum of consecutive naturals, for example, 33556 + ... + 33937.

It is an arithmetic number, because the mean of its divisors is an integer number (3239712).

Almost surely, 2^12891163 is an apocalyptic number.

12891163 is a deficient number, since it is larger than the sum of its proper divisors (67685).

12891163 is an equidigital number, since it uses as much as digits as its factorization.

12891163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67684.

The product of its digits is 2592, while the sum is 31.

The square root of 12891163 is about 3590.4265763277. The cubic root of 12891163 is about 234.4754438335.

The spelling of 12891163 in words is "twelve million, eight hundred ninety-one thousand, one hundred sixty-three".