9903871 has 2 divisors, whose sum is σ = 9903872. Its totient is φ = 9903870.

The previous prime is 9903857. The next prime is 9903913. The reversal of 9903871 is 1783099.

It is a weak prime.

It is an emirp because it is prime and its reverse (1783099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9903871 - 2⁹ = 9903359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9903871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9903811) 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, 4951935 + 4951936.

It is an arithmetic number, because the mean of its divisors is an integer number (4951936).

Almost surely, 2^9903871 is an apocalyptic number.

9903871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9903871 is an equidigital number, since it uses as much as digits as its factorization.

9903871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9903871 is about 3147.0416266710. The cubic root of 9903871 is about 214.7508995315.

The spelling of 9903871 in words is "nine million, nine hundred three thousand, eight hundred seventy-one".