2006173 has 4 divisors (see below), whose sum is σ = 2160508. Its totient is φ = 1851840.

The previous prime is 2006159. The next prime is 2006183. The reversal of 2006173 is 3716002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 1800964 = 453^2 + 1342^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006173 - 2⁵ = 2006141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2006173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006183) 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 3 ways as a sum of consecutive naturals, for example, 77148 + ... + 77173.

It is an arithmetic number, because the mean of its divisors is an integer number (540127).

2^2006173 is an apocalyptic number.

It is an amenable number.

2006173 is a deficient number, since it is larger than the sum of its proper divisors (154335).

2006173 is a wasteful number, since it uses less digits than its factorization.

2006173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154334.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 2006173 is about 1416.3943659871. The cubic root of 2006173 is about 126.1215967327.

The spelling of 2006173 in words is "two million, six thousand, one hundred seventy-three".