199442791 has 8 divisors (see below), whose sum is σ = 210083120. Its totient is φ = 188816832.

The previous prime is 199442779. The next prime is 199442797. The reversal of 199442791 is 197244991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199442791 - 2¹⁷ = 199311719 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 (199442797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36451 + ... + 41563.

It is an arithmetic number, because the mean of its divisors is an integer number (26260390).

Almost surely, 2^199442791 is an apocalyptic number.

199442791 is a deficient number, since it is larger than the sum of its proper divisors (10640329).

199442791 is a wasteful number, since it uses less digits than its factorization.

199442791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7185.

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

The square root of 199442791 is about 14122.4215699716. The cubic root of 199442791 is about 584.2599461636.

The spelling of 199442791 in words is "one hundred ninety-nine million, four hundred forty-two thousand, seven hundred ninety-one".