199442471 has 4 divisors (see below), whose sum is σ = 204080712. Its totient is φ = 194804232.

The previous prime is 199442459. The next prime is 199442473. The reversal of 199442471 is 174244991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199442471 - 2²² = 195248167 is a prime.

It is a super-3 number, since 3×199442471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199442473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319056 + ... + 2319141.

It is an arithmetic number, because the mean of its divisors is an integer number (51020178).

Almost surely, 2^199442471 is an apocalyptic number.

199442471 is a deficient number, since it is larger than the sum of its proper divisors (4638241).

199442471 is an equidigital number, since it uses as much as digits as its factorization.

199442471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638240.

The product of its digits is 72576, while the sum is 41.

The square root of 199442471 is about 14122.4102404653. The cubic root of 199442471 is about 584.2596336875.

The spelling of 199442471 in words is "one hundred ninety-nine million, four hundred forty-two thousand, four hundred seventy-one".