9902871 has 16 divisors (see below), whose sum is σ = 16005120. Its totient is φ = 6001560.

The previous prime is 9902861. The next prime is 9902873. The reversal of 9902871 is 1782099.

It is a happy number.

It is not a de Polignac number, because 9902871 - 2⁵ = 9902839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16375 + ... + 16968.

It is an arithmetic number, because the mean of its divisors is an integer number (1000320).

Almost surely, 2^9902871 is an apocalyptic number.

9902871 is a deficient number, since it is larger than the sum of its proper divisors (6102249).

9902871 is a wasteful number, since it uses less digits than its factorization.

9902871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33363 (or 33357 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 9902871 is about 3146.8827432874. The cubic root of 9902871 is about 214.7436714444.

It can be divided in two parts, 99028 and 71, that added together give a palindrome (99099).

The spelling of 9902871 in words is "nine million, nine hundred two thousand, eight hundred seventy-one".