199560947 has 2 divisors, whose sum is σ = 199560948. Its totient is φ = 199560946.

The previous prime is 199560931. The next prime is 199560961. The reversal of 199560947 is 749065991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199560947 - 2⁴ = 199560931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199560895 and 199560904.

It is not a weakly prime, because it can be changed into another prime (199560917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99780473 + 99780474.

It is an arithmetic number, because the mean of its divisors is an integer number (99780474).

Almost surely, 2^199560947 is an apocalyptic number.

199560947 is a deficient number, since it is larger than the sum of its proper divisors (1).

199560947 is an equidigital number, since it uses as much as digits as its factorization.

199560947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 199560947 is about 14126.6042274851. The cubic root of 199560947 is about 584.3753011980.

The spelling of 199560947 in words is "one hundred ninety-nine million, five hundred sixty thousand, nine hundred forty-seven".