173009 has 4 divisors (see below), whose sum is σ = 183204. Its totient is φ = 162816.

The previous prime is 172999. The next prime is 173021. The reversal of 173009 is 900371.

173009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900371 = 17 ⋅52963.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 48400 = 353^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 173009 - 2⁴ = 172993 is a prime.

It is a super-2 number, since 2×173009² = 59864228162, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5072 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (45801).

2¹⁷³⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

173009 is a deficient number, since it is larger than the sum of its proper divisors (10195).

173009 is a wasteful number, since it uses less digits than its factorization.

173009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 173009 is about 415.9435057793. The cubic root of 173009 is about 55.7215127909.

The spelling of 173009 in words is "one hundred seventy-three thousand, nine".