730309 has 4 divisors (see below), whose sum is σ = 732160. Its totient is φ = 728460.

The previous prime is 730297. The next prime is 730321. The reversal of 730309 is 903037.

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 an interprime number because it is at equal distance from previous prime (730297) and next prime (730321).

It is a cyclic number.

It is not a de Polignac number, because 730309 - 2⁵ = 730277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 730309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730339) 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, 69 + ... + 1210.

It is an arithmetic number, because the mean of its divisors is an integer number (183040).

2⁷³⁰³⁰⁹ is an apocalyptic number.

It is an amenable number.

730309 is a deficient number, since it is larger than the sum of its proper divisors (1851).

730309 is a wasteful number, since it uses less digits than its factorization.

730309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 567, while the sum is 22.

The square root of 730309 is about 854.5811839726. The cubic root of 730309 is about 90.0538361027.

The spelling of 730309 in words is "seven hundred thirty thousand, three hundred nine".