9720171 has 12 divisors (see below), whose sum is σ = 14088672. Its totient is φ = 6457776.

The previous prime is 9720163. The next prime is 9720197. The reversal of 9720171 is 1710279.

9720171 = T₈₃₅ + T₈₃₆ + ... + T₈₆₁.

It is not a de Polignac number, because 9720171 - 2³ = 9720163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9720121) 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 11 ways as a sum of consecutive naturals, for example, 1150 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (1174056).

Almost surely, 2^9720171 is an apocalyptic number.

9720171 is a deficient number, since it is larger than the sum of its proper divisors (4368501).

9720171 is a wasteful number, since it uses less digits than its factorization.

9720171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730 (or 3727 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 9720171 is about 3117.7188776412. The cubic root of 9720171 is about 213.4148497616.

The spelling of 9720171 in words is "nine million, seven hundred twenty thousand, one hundred seventy-one".