9709871 has 4 divisors (see below), whose sum is σ = 9916512. Its totient is φ = 9503232.

The previous prime is 9709859. The next prime is 9709891. The reversal of 9709871 is 1789079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1789079 = 887 ⋅2017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9709871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9709891) 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, 103250 + ... + 103343.

It is an arithmetic number, because the mean of its divisors is an integer number (2479128).

Almost surely, 2^9709871 is an apocalyptic number.

9709871 is a deficient number, since it is larger than the sum of its proper divisors (206641).

9709871 is a wasteful number, since it uses less digits than its factorization.

9709871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206640.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 9709871 is about 3116.0665910728. The cubic root of 9709871 is about 213.3394412856.

The spelling of 9709871 in words is "nine million, seven hundred nine thousand, eight hundred seventy-one".