730527781 has 2 divisors, whose sum is σ = 730527782. Its totient is φ = 730527780.

The previous prime is 730527769. The next prime is 730527857. The reversal of 730527781 is 187725037.

730527781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474847681 + 255680100 = 21791^2 + 15990^2 .

It is an emirp because it is prime and its reverse (187725037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730527781 - 2⁷ = 730527653 is a prime.

It is a super-2 number, since 2×730527781² = 1067341677625567922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (730527761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365263890 + 365263891.

It is an arithmetic number, because the mean of its divisors is an integer number (365263891).

Almost surely, 2^730527781 is an apocalyptic number.

It is an amenable number.

730527781 is a deficient number, since it is larger than the sum of its proper divisors (1).

730527781 is an equidigital number, since it uses as much as digits as its factorization.

730527781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 730527781 is about 27028.2774330885. The cubic root of 730527781 is about 900.6282777667.

The spelling of 730527781 in words is "seven hundred thirty million, five hundred twenty-seven thousand, seven hundred eighty-one".