730321913 has 2 divisors, whose sum is σ = 730321914. Its totient is φ = 730321912.

The previous prime is 730321871. The next prime is 730321931. The reversal of 730321913 is 319123037.

Together with next prime (730321931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506610064 + 223711849 = 22508^2 + 14957^2 .

It is an emirp because it is prime and its reverse (319123037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730321913 - 2⁶ = 730321849 is a prime.

It is not a weakly prime, because it can be changed into another prime (730321213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365160956 + 365160957.

It is an arithmetic number, because the mean of its divisors is an integer number (365160957).

Almost surely, 2^730321913 is an apocalyptic number.

It is an amenable number.

730321913 is a deficient number, since it is larger than the sum of its proper divisors (1).

730321913 is an equidigital number, since it uses as much as digits as its factorization.

730321913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 730321913 is about 27024.4687829382. The cubic root of 730321913 is about 900.5436686359.

The spelling of 730321913 in words is "seven hundred thirty million, three hundred twenty-one thousand, nine hundred thirteen".