199993271 has 2 divisors, whose sum is σ = 199993272. Its totient is φ = 199993270.

The previous prime is 199993267. The next prime is 199993273. The reversal of 199993271 is 172399991.

It is a strong prime.

It is an emirp because it is prime and its reverse (172399991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199993271 - 2² = 199993267 is a prime.

Together with 199993273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199993273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99996635 + 99996636.

It is an arithmetic number, because the mean of its divisors is an integer number (99996636).

Almost surely, 2^199993271 is an apocalyptic number.

199993271 is a deficient number, since it is larger than the sum of its proper divisors (1).

199993271 is an equidigital number, since it uses as much as digits as its factorization.

199993271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 50.

The square root of 199993271 is about 14141.8977156533. The cubic root of 199993271 is about 584.7969889972.

The spelling of 199993271 in words is "one hundred ninety-nine million, nine hundred ninety-three thousand, two hundred seventy-one".