4891390171 has 2 divisors, whose sum is σ = 4891390172. Its totient is φ = 4891390170.

The previous prime is 4891390117. The next prime is 4891390187. The reversal of 4891390171 is 1710931984.

4891390171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (4891390117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4891390171 - 2⁷ = 4891390043 is a prime.

It is not a weakly prime, because it can be changed into another prime (4891300171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445695085 + 2445695086.

It is an arithmetic number, because the mean of its divisors is an integer number (2445695086).

Almost surely, 2^4891390171 is an apocalyptic number.

4891390171 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891390171 is an equidigital number, since it uses as much as digits as its factorization.

4891390171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 4891390171 is about 69938.4741826700. The cubic root of 4891390171 is about 1697.5038534880.

The spelling of 4891390171 in words is "four billion, eight hundred ninety-one million, three hundred ninety thousand, one hundred seventy-one".