706220561 has 2 divisors, whose sum is σ = 706220562. Its totient is φ = 706220560.

The previous prime is 706220513. The next prime is 706220569. The reversal of 706220561 is 165022607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359329936 + 346890625 = 18956^2 + 18625^2 .

It is a cyclic number.

It is not a de Polignac number, because 706220561 - 2¹⁰ = 706219537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (706220569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353110280 + 353110281.

It is an arithmetic number, because the mean of its divisors is an integer number (353110281).

Almost surely, 2^706220561 is an apocalyptic number.

It is an amenable number.

706220561 is a deficient number, since it is larger than the sum of its proper divisors (1).

706220561 is an equidigital number, since it uses as much as digits as its factorization.

706220561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 706220561 is about 26574.8106484317. The cubic root of 706220561 is about 890.5263733872.

The spelling of 706220561 in words is "seven hundred six million, two hundred twenty thousand, five hundred sixty-one".