997173 has 12 divisors (see below), whose sum is σ = 1455948. Its totient is φ = 657600.

The previous prime is 997163. The next prime is 997201. The reversal of 997173 is 371799.

It can be written as a sum of positive squares in 2 ways, for example, as 675684 + 321489 = 822^2 + 567^2 .

It is not a de Polignac number, because 997173 - 2⁵ = 997141 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997103) 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 11 ways as a sum of consecutive naturals, for example, 361 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (121329).

2⁹⁹⁷¹⁷³ is an apocalyptic number.

It is an amenable number.

997173 is a deficient number, since it is larger than the sum of its proper divisors (458775).

997173 is a wasteful number, since it uses less digits than its factorization.

997173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1201 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 997173 is about 998.5854995943. The cubic root of 997173 is about 99.9056777277.

It can be divided in two parts, 99717 and 3, that multiplied together give a triangular number (299151 = T₇₇₃).

The spelling of 997173 in words is "nine hundred ninety-seven thousand, one hundred seventy-three".