199900142 has 32 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 89992800.

The previous prime is 199900123. The next prime is 199900147. The reversal of 199900142 is 241009991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199900147) 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 in 15 ways as a sum of consecutive naturals, for example, 231203 + ... + 232065.

It is an arithmetic number, because the mean of its divisors is an integer number (10342080).

Almost surely, 2^199900142 is an apocalyptic number.

199900142 is a deficient number, since it is larger than the sum of its proper divisors (131046418).

199900142 is a wasteful number, since it uses less digits than its factorization.

199900142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 199900142 is about 14138.6046694856. The cubic root of 199900142 is about 584.7062025852.

The spelling of 199900142 in words is "one hundred ninety-nine million, nine hundred thousand, one hundred forty-two".