199789042 has 8 divisors (see below), whose sum is σ = 304156656. Its totient is φ = 98403492.

The previous prime is 199789021. The next prime is 199789087. The reversal of 199789042 is 240987991.

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

It is a super-2 number, since 2×199789042² = 79831322606555528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745348 + ... + 745615.

It is an arithmetic number, because the mean of its divisors is an integer number (38019582).

Almost surely, 2^199789042 is an apocalyptic number.

199789042 is a deficient number, since it is larger than the sum of its proper divisors (104367614).

199789042 is a wasteful number, since it uses less digits than its factorization.

199789042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491032.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 199789042 is about 14134.6751642901. The cubic root of 199789042 is about 584.5978603286.

The spelling of 199789042 in words is "one hundred ninety-nine million, seven hundred eighty-nine thousand, forty-two".