730909 has 2 divisors, whose sum is σ = 730910. Its totient is φ = 730908.

The previous prime is 730901. The next prime is 730913. The reversal of 730909 is 909037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 675684 + 55225 = 822^2 + 235^2 .

It is an emirp because it is prime and its reverse (909037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730909 - 2³ = 730901 is a prime.

730909 is a modest number, since divided by 909 gives 73 as remainder.

It is equal to p₅₈₈₅₂ and since 730909 and 58852 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730901) 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 as a sum of consecutive naturals, namely, 365454 + 365455.

It is an arithmetic number, because the mean of its divisors is an integer number (365455).

2⁷³⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

730909 is a deficient number, since it is larger than the sum of its proper divisors (1).

730909 is an equidigital number, since it uses as much as digits as its factorization.

730909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 730909 is about 854.9321610514. The cubic root of 730909 is about 90.0784911968.

The spelling of 730909 in words is "seven hundred thirty thousand, nine hundred nine".