199966147 has 2 divisors, whose sum is σ = 199966148. Its totient is φ = 199966146.

The previous prime is 199966079. The next prime is 199966171. The reversal of 199966147 is 741669991.

It is a strong prime.

It is an emirp because it is prime and its reverse (741669991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199966147 - 2¹¹ = 199964099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199966094 and 199966103.

It is not a weakly prime, because it can be changed into another prime (199963147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99983073 + 99983074.

It is an arithmetic number, because the mean of its divisors is an integer number (99983074).

Almost surely, 2^199966147 is an apocalyptic number.

199966147 is a deficient number, since it is larger than the sum of its proper divisors (1).

199966147 is an equidigital number, since it uses as much as digits as its factorization.

199966147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 199966147 is about 14140.9386887858. The cubic root of 199966147 is about 584.7705501899.

The spelling of 199966147 in words is "one hundred ninety-nine million, nine hundred sixty-six thousand, one hundred forty-seven".