9979171 has 4 divisors (see below), whose sum is σ = 10413072. Its totient is φ = 9545272.

The previous prime is 9979169. The next prime is 9979183. The reversal of 9979171 is 1719799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9979171 - 2¹ = 9979169 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9979111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216916 + ... + 216961.

It is an arithmetic number, because the mean of its divisors is an integer number (2603268).

Almost surely, 2^9979171 is an apocalyptic number.

9979171 is a deficient number, since it is larger than the sum of its proper divisors (433901).

9979171 is a wasteful number, since it uses less digits than its factorization.

9979171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433900.

The product of its digits is 35721, while the sum is 43.

The square root of 9979171 is about 3158.9825893791. The cubic root of 9979171 is about 215.2937826273.

The spelling of 9979171 in words is "nine million, nine hundred seventy-nine thousand, one hundred seventy-one".