199241947 has 2 divisors, whose sum is σ = 199241948. Its totient is φ = 199241946.

The previous prime is 199241881. The next prime is 199241953. The reversal of 199241947 is 749142991.

199241947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (749142991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199241947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199241897 and 199241906.

It is not a weakly prime, because it can be changed into another prime (199241047) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99620973 + 99620974.

It is an arithmetic number, because the mean of its divisors is an integer number (99620974).

Almost surely, 2^199241947 is an apocalyptic number.

199241947 is a deficient number, since it is larger than the sum of its proper divisors (1).

199241947 is an equidigital number, since it uses as much as digits as its factorization.

199241947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 199241947 is about 14115.3089587157. The cubic root of 199241947 is about 584.0637587156.

The spelling of 199241947 in words is "one hundred ninety-nine million, two hundred forty-one thousand, nine hundred forty-seven".