100173 has 4 divisors (see below), whose sum is σ = 133568. Its totient is φ = 66780.

The previous prime is 100169. The next prime is 100183. The reversal of 100173 is 371001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371001 = 3 ⋅123667.

It is not a de Polignac number, because 100173 - 2² = 100169 is a prime.

It is a D-number.

It is the 317-th Hogben 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 (100103) by changing a digit.

It is a nontrivial repunit in base 316.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16693 + ... + 16698.

It is an arithmetic number, because the mean of its divisors is an integer number (33392).

2¹⁰⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

100173 is a deficient number, since it is larger than the sum of its proper divisors (33395).

100173 is an equidigital number, since it uses as much as digits as its factorization.

100173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33394.

The product of its (nonzero) digits is 21, while the sum is 12.

The square root of 100173 is about 316.5011848319. The cubic root of 100173 is about 46.4426394112.

Adding to 100173 its reverse (371001), we get a palindrome (471174).

The spelling of 100173 in words is "one hundred thousand, one hundred seventy-three", and thus it is an iban number.