730563721 has 2 divisors, whose sum is σ = 730563722. Its totient is φ = 730563720.

The previous prime is 730563703. The next prime is 730563727. The reversal of 730563721 is 127365037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657204496 + 73359225 = 25636^2 + 8565^2 .

It is a cyclic number.

It is not a de Polignac number, because 730563721 - 2⁹ = 730563209 is a prime.

It is not a weakly prime, because it can be changed into another prime (730563727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365281860 + 365281861.

It is an arithmetic number, because the mean of its divisors is an integer number (365281861).

Almost surely, 2^730563721 is an apocalyptic number.

It is an amenable number.

730563721 is a deficient number, since it is larger than the sum of its proper divisors (1).

730563721 is an equidigital number, since it uses as much as digits as its factorization.

730563721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 730563721 is about 27028.9422841516. The cubic root of 730563721 is about 900.6430470200.

The spelling of 730563721 in words is "seven hundred thirty million, five hundred sixty-three thousand, seven hundred twenty-one".