730523 has 4 divisors (see below), whose sum is σ = 732600. Its totient is φ = 728448.

The previous prime is 730487. The next prime is 730537. The reversal of 730523 is 325037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325037 = 43 ⋅7559.

It is a cyclic number.

It is not a de Polignac number, because 730523 - 2⁶ = 730459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 730495 and 730504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730553) 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, 365 + ... + 1262.

It is an arithmetic number, because the mean of its divisors is an integer number (183150).

2⁷³⁰⁵²³ is an apocalyptic number.

730523 is a deficient number, since it is larger than the sum of its proper divisors (2077).

730523 is a wasteful number, since it uses less digits than its factorization.

730523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 730523 is about 854.7063823326. The cubic root of 730523 is about 90.0626313017.

The spelling of 730523 in words is "seven hundred thirty thousand, five hundred twenty-three".