9897171 has 4 divisors (see below), whose sum is σ = 13196232. Its totient is φ = 6598112.

The previous prime is 9897161. The next prime is 9897203. The reversal of 9897171 is 1717989.

It is a happy number.

9897171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9897171 - 2⁹ = 9896659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9897161) 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, 1649526 + ... + 1649531.

It is an arithmetic number, because the mean of its divisors is an integer number (3299058).

Almost surely, 2^9897171 is an apocalyptic number.

9897171 is a deficient number, since it is larger than the sum of its proper divisors (3299061).

9897171 is a wasteful number, since it uses less digits than its factorization.

9897171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299060.

The product of its digits is 31752, while the sum is 42.

The square root of 9897171 is about 3145.9769547789. The cubic root of 9897171 is about 214.7024620533.

The spelling of 9897171 in words is "nine million, eight hundred ninety-seven thousand, one hundred seventy-one".