9791084561 has 2 divisors, whose sum is σ = 9791084562. Its totient is φ = 9791084560.

The previous prime is 9791084551. The next prime is 9791084591. The reversal of 9791084561 is 1654801979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8291923600 + 1499160961 = 91060^2 + 38719^2 .

It is a cyclic number.

It is not a de Polignac number, because 9791084561 - 2⁶ = 9791084497 is a prime.

It is not a weakly prime, because it can be changed into another prime (9791084551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895542280 + 4895542281.

It is an arithmetic number, because the mean of its divisors is an integer number (4895542281).

Almost surely, 2^9791084561 is an apocalyptic number.

It is an amenable number.

9791084561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791084561 is an equidigital number, since it uses as much as digits as its factorization.

9791084561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 9791084561 is about 98949.9093531672. The cubic root of 9791084561 is about 2139.3258249148.

The spelling of 9791084561 in words is "nine billion, seven hundred ninety-one million, eighty-four thousand, five hundred sixty-one".