199560961 has 2 divisors, whose sum is σ = 199560962. Its totient is φ = 199560960.

The previous prime is 199560947. The next prime is 199560997. The reversal of 199560961 is 169065991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 89415936 = 10495^2 + 9456^2 .

It is a cyclic number.

It is not a de Polignac number, because 199560961 - 2¹¹ = 199558913 is a prime.

It is not a weakly prime, because it can be changed into another prime (199560931) 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, 99780480 + 99780481.

It is an arithmetic number, because the mean of its divisors is an integer number (99780481).

Almost surely, 2^199560961 is an apocalyptic number.

It is an amenable number.

199560961 is a deficient number, since it is larger than the sum of its proper divisors (1).

199560961 is an equidigital number, since it uses as much as digits as its factorization.

199560961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 199560961 is about 14126.6047230040. The cubic root of 199560961 is about 584.3753148635.

The spelling of 199560961 in words is "one hundred ninety-nine million, five hundred sixty thousand, nine hundred sixty-one".