199942143 has 8 divisors (see below), whose sum is σ = 266706048. Its totient is φ = 133236504.

The previous prime is 199942139. The next prime is 199942159. The reversal of 199942143 is 341249991.

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

It is not a de Polignac number, because 199942143 - 2² = 199942139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199942095 and 199942104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199942163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5805 + ... + 20822.

It is an arithmetic number, because the mean of its divisors is an integer number (33338256).

Almost surely, 2^199942143 is an apocalyptic number.

199942143 is a deficient number, since it is larger than the sum of its proper divisors (66763905).

199942143 is a wasteful number, since it uses less digits than its factorization.

199942143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29133.

The product of its digits is 69984, while the sum is 42.

The square root of 199942143 is about 14140.0899219206. The cubic root of 199942143 is about 584.7471505725.

The spelling of 199942143 in words is "one hundred ninety-nine million, nine hundred forty-two thousand, one hundred forty-three".