730521361 has 2 divisors, whose sum is σ = 730521362. Its totient is φ = 730521360.

The previous prime is 730521347. The next prime is 730521413. The reversal of 730521361 is 163125037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627803136 + 102718225 = 25056^2 + 10135^2 .

It is an emirp because it is prime and its reverse (163125037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730521361 - 2¹¹ = 730519313 is a prime.

It is a super-2 number, since 2×730521361² = 1067322917754584642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (730522361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365260680 + 365260681.

It is an arithmetic number, because the mean of its divisors is an integer number (365260681).

Almost surely, 2^730521361 is an apocalyptic number.

It is an amenable number.

730521361 is a deficient number, since it is larger than the sum of its proper divisors (1).

730521361 is an equidigital number, since it uses as much as digits as its factorization.

730521361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 730521361 is about 27028.1586683222. The cubic root of 730521361 is about 900.6256394684.

Adding to 730521361 its reverse (163125037), we get a palindrome (893646398).

The spelling of 730521361 in words is "seven hundred thirty million, five hundred twenty-one thousand, three hundred sixty-one".