730173 has 4 divisors (see below), whose sum is σ = 973568. Its totient is φ = 486780.

The previous prime is 730157. The next prime is 730187. The reversal of 730173 is 371037.

730173 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 730173 - 2⁴ = 730157 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730573) 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, 121693 + ... + 121698.

It is an arithmetic number, because the mean of its divisors is an integer number (243392).

2⁷³⁰¹⁷³ is an apocalyptic number.

It is an amenable number.

730173 is a deficient number, since it is larger than the sum of its proper divisors (243395).

730173 is a wasteful number, since it uses less digits than its factorization.

730173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243394.

The product of its (nonzero) digits is 441, while the sum is 21.

The square root of 730173 is about 854.5016091266. The cubic root of 730173 is about 90.0482457375.

It can be divided in two parts, 730 and 173, that added together give a triangular number (903 = T₄₂).

The spelling of 730173 in words is "seven hundred thirty thousand, one hundred seventy-three".