705968561 has 2 divisors, whose sum is σ = 705968562. Its totient is φ = 705968560.

The previous prime is 705968551. The next prime is 705968591. The reversal of 705968561 is 165869507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679384225 + 26584336 = 26065^2 + 5156^2 .

It is an emirp because it is prime and its reverse (165869507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 705968561 - 2²² = 701774257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (705968531) 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, 352984280 + 352984281.

It is an arithmetic number, because the mean of its divisors is an integer number (352984281).

Almost surely, 2^705968561 is an apocalyptic number.

It is an amenable number.

705968561 is a deficient number, since it is larger than the sum of its proper divisors (1).

705968561 is an equidigital number, since it uses as much as digits as its factorization.

705968561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 705968561 is about 26570.0688933996. The cubic root of 705968561 is about 890.4204388978.

The spelling of 705968561 in words is "seven hundred five million, nine hundred sixty-eight thousand, five hundred sixty-one".