199838071 has 6 divisors (see below), whose sum is σ = 204595440. Its totient is φ = 195188868.

The previous prime is 199838069. The next prime is 199838113. The reversal of 199838071 is 170838991.

It is not a de Polignac number, because 199838071 - 2¹ = 199838069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199833071) 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 in 5 ways as a sum of consecutive naturals, for example, 52191 + ... + 55888.

It is an arithmetic number, because the mean of its divisors is an integer number (34099240).

Almost surely, 2^199838071 is an apocalyptic number.

199838071 is a deficient number, since it is larger than the sum of its proper divisors (4757369).

199838071 is an equidigital number, since it uses as much as digits as its factorization.

199838071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108165 (or 108122 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 199838071 is about 14136.4094097476. The cubic root of 199838071 is about 584.6456772725.

The spelling of 199838071 in words is "one hundred ninety-nine million, eight hundred thirty-eight thousand, seventy-one".