706516721 has 2 divisors, whose sum is σ = 706516722. Its totient is φ = 706516720.

The previous prime is 706516697. The next prime is 706516771. The reversal of 706516721 is 127615607.

706516721 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., 404452321 + 302064400 = 20111^2 + 17380^2 .

It is a cyclic number.

It is not a de Polignac number, because 706516721 - 2¹⁰ = 706515697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (706516771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353258360 + 353258361.

It is an arithmetic number, because the mean of its divisors is an integer number (353258361).

Almost surely, 2^706516721 is an apocalyptic number.

It is an amenable number.

706516721 is a deficient number, since it is larger than the sum of its proper divisors (1).

706516721 is an equidigital number, since it uses as much as digits as its factorization.

706516721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 706516721 is about 26580.3822583499. The cubic root of 706516721 is about 890.6508394284.

The spelling of 706516721 in words is "seven hundred six million, five hundred sixteen thousand, seven hundred twenty-one".