997008173 has 16 divisors (see below), whose sum is σ = 1167728640. Its totient is φ = 833610096.

The previous prime is 997008161. The next prime is 997008211. The reversal of 997008173 is 371800799.

It is a cyclic number.

It is not a de Polignac number, because 997008173 - 2¹⁰ = 997007149 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997008473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37988 + ... + 58626.

It is an arithmetic number, because the mean of its divisors is an integer number (72983040).

Almost surely, 2^997008173 is an apocalyptic number.

It is an amenable number.

997008173 is a deficient number, since it is larger than the sum of its proper divisors (170720467).

997008173 is a wasteful number, since it uses less digits than its factorization.

997008173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20816.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 997008173 is about 31575.4362281822. The cubic root of 997008173 is about 999.0017281182.

The spelling of 997008173 in words is "nine hundred ninety-seven million, eight thousand, one hundred seventy-three".