7730561 has 2 divisors, whose sum is σ = 7730562. Its totient is φ = 7730560.

The previous prime is 7730539. The next prime is 7730573. The reversal of 7730561 is 1650377.

7730561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5856400 + 1874161 = 2420^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 7730561 - 2¹⁰ = 7729537 is a prime.

It is not a weakly prime, because it can be changed into another prime (7730531) 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, 3865280 + 3865281.

It is an arithmetic number, because the mean of its divisors is an integer number (3865281).

Almost surely, 2^7730561 is an apocalyptic number.

It is an amenable number.

7730561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7730561 is an equidigital number, since it uses as much as digits as its factorization.

7730561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 7730561 is about 2780.3886418988. The cubic root of 7730561 is about 197.7289850623.

The spelling of 7730561 in words is "seven million, seven hundred thirty thousand, five hundred sixty-one".