989171 has 2 divisors, whose sum is σ = 989172. Its totient is φ = 989170.

The previous prime is 989123. The next prime is 989173. The reversal of 989171 is 171989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989171 - 2¹⁰ = 988147 is a prime.

It is a Sophie Germain prime.

Together with 989173, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989171.

It is not a weakly prime, because it can be changed into another prime (989173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494585 + 494586.

It is an arithmetic number, because the mean of its divisors is an integer number (494586).

2⁹⁸⁹¹⁷¹ is an apocalyptic number.

989171 is a deficient number, since it is larger than the sum of its proper divisors (1).

989171 is an equidigital number, since it uses as much as digits as its factorization.

989171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 35.

The square root of 989171 is about 994.5707616857. The cubic root of 989171 is about 99.6377224681.

The spelling of 989171 in words is "nine hundred eighty-nine thousand, one hundred seventy-one".