64173 has 4 divisors (see below), whose sum is σ = 85568. Its totient is φ = 42780.

The previous prime is 64171. The next prime is 64187. The reversal of 64173 is 37146.

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.

It is not a de Polignac number, because 64173 - 2¹ = 64171 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10693 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (21392).

2⁶⁴¹⁷³ is an apocalyptic number.

It is an amenable number.

64173 is a deficient number, since it is larger than the sum of its proper divisors (21395).

64173 is a wasteful number, since it uses less digits than its factorization.

64173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21394.

The product of its digits is 504, while the sum is 21.

The square root of 64173 is about 253.3239033333. The cubic root of 64173 is about 40.0360092403.

The spelling of 64173 in words is "sixty-four thousand, one hundred seventy-three".