730073 has 6 divisors (see below), whose sum is σ = 745614. Its totient is φ = 714816.

The previous prime is 730069. The next prime is 730091. The reversal of 730073 is 370037.

It can be written as a sum of positive squares in 3 ways, for example, as 170569 + 559504 = 413^2 + 748^2 .

It is not a de Polignac number, because 730073 - 2² = 730069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730003) 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 5 ways as a sum of consecutive naturals, for example, 5261 + ... + 5397.

It is an arithmetic number, because the mean of its divisors is an integer number (124269).

2⁷³⁰⁰⁷³ is an apocalyptic number.

730073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

730073 is a deficient number, since it is larger than the sum of its proper divisors (15541).

730073 is an equidigital number, since it uses as much as digits as its factorization.

730073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 441, while the sum is 20.

The square root of 730073 is about 854.4430934825. The cubic root of 730073 is about 90.0441347320.

It can be divided in two parts, 7300 and 73, that multiplied together give a square (532900 = 730²).

The spelling of 730073 in words is "seven hundred thirty thousand, seventy-three".