199559747 has 2 divisors, whose sum is σ = 199559748. Its totient is φ = 199559746.

The previous prime is 199559743. The next prime is 199559779. The reversal of 199559747 is 747955991.

It is a weak prime.

It is an emirp because it is prime and its reverse (747955991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199559747 - 2² = 199559743 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199559692 and 199559701.

It is not a weakly prime, because it can be changed into another prime (199559743) 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, 99779873 + 99779874.

It is an arithmetic number, because the mean of its divisors is an integer number (99779874).

Almost surely, 2^199559747 is an apocalyptic number.

199559747 is a deficient number, since it is larger than the sum of its proper divisors (1).

199559747 is an equidigital number, since it uses as much as digits as its factorization.

199559747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3572100, while the sum is 56.

The square root of 199559747 is about 14126.5617543690. The cubic root of 199559747 is about 584.3741298737.

The spelling of 199559747 in words is "one hundred ninety-nine million, five hundred fifty-nine thousand, seven hundred forty-seven".