989173 has 2 divisors, whose sum is σ = 989174. Its totient is φ = 989172.

The previous prime is 989171. The next prime is 989231. The reversal of 989173 is 371989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736164 + 253009 = 858^2 + 503^2 .

It is a cyclic number.

It is not a de Polignac number, because 989173 - 2¹ = 989171 is a prime.

Together with 989171, it forms a pair of twin primes.

989173 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494586 + 494587.

It is an arithmetic number, because the mean of its divisors is an integer number (494587).

2⁹⁸⁹¹⁷³ is an apocalyptic number.

It is an amenable number.

989173 is a deficient number, since it is larger than the sum of its proper divisors (1).

989173 is an equidigital number, since it uses as much as digits as its factorization.

989173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 989173 is about 994.5717671440. The cubic root of 989173 is about 99.6377896204.

The spelling of 989173 in words is "nine hundred eighty-nine thousand, one hundred seventy-three".