13173 has 4 divisors (see below), whose sum is σ = 17568. Its totient is φ = 8780.

The previous prime is 13171. The next prime is 13177. The reversal of 13173 is 37131.

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: 37131 = 3 ⋅12377.

It is a cyclic number.

It is not a de Polignac number, because 13173 - 2¹ = 13171 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁸ + 1 + 7² + 3⁸ .

It is a D-number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13171) 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, 2193 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (4392).

2¹³¹⁷³ is an apocalyptic number.

It is an amenable number.

13173 is a deficient number, since it is larger than the sum of its proper divisors (4395).

13173 is an equidigital number, since it uses as much as digits as its factorization.

13173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394.

The product of its digits is 63, while the sum is 15.

The square root of 13173 is about 114.7736903650. The cubic root of 13173 is about 23.6171903864.

The spelling of 13173 in words is "thirteen thousand, one hundred seventy-three".