998173 has 8 divisors (see below), whose sum is σ = 1100736. Its totient is φ = 897600.

The previous prime is 998167. The next prime is 998197. The reversal of 998173 is 371899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998173 - 2¹³ = 989981 is a prime.

It is a Duffinian number.

998173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693 + ... + 1573.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2⁹⁹⁸¹⁷³ is an apocalyptic number.

It is an amenable number.

998173 is a deficient number, since it is larger than the sum of its proper divisors (102563).

998173 is a wasteful number, since it uses less digits than its factorization.

998173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995.

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

The square root of 998173 is about 999.0860823773. The cubic root of 998173 is about 99.9390628742.

The spelling of 998173 in words is "nine hundred ninety-eight thousand, one hundred seventy-three".