9813871 has 2 divisors, whose sum is σ = 9813872. Its totient is φ = 9813870.

The previous prime is 9813829. The next prime is 9813877. The reversal of 9813871 is 1783189.

It is a strong prime.

It is an emirp because it is prime and its reverse (1783189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9813871 - 2⁹ = 9813359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9813871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9813877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906935 + 4906936.

It is an arithmetic number, because the mean of its divisors is an integer number (4906936).

Almost surely, 2^9813871 is an apocalyptic number.

9813871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9813871 is an equidigital number, since it uses as much as digits as its factorization.

9813871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 9813871 is about 3132.7098493158. The cubic root of 9813871 is about 214.0984131160.

The spelling of 9813871 in words is "nine million, eight hundred thirteen thousand, eight hundred seventy-one".