199996142 has 4 divisors (see below), whose sum is σ = 299994216. Its totient is φ = 99998070.

The previous prime is 199996141. The next prime is 199996157. The reversal of 199996142 is 241699991.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199996141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999034 + ... + 49999037.

It is an arithmetic number, because the mean of its divisors is an integer number (74998554).

Almost surely, 2^199996142 is an apocalyptic number.

199996142 is a deficient number, since it is larger than the sum of its proper divisors (99998074).

199996142 is an equidigital number, since it uses as much as digits as its factorization.

199996142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99998073.

The product of its digits is 314928, while the sum is 50.

The square root of 199996142 is about 14141.9992221751. Note that the first 3 decimals coincide. The cubic root of 199996142 is about 584.7997873316.

The spelling of 199996142 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, one hundred forty-two".