199172042 has 8 divisors (see below), whose sum is σ = 311747616. Its totient is φ = 95256172.

The previous prime is 199172033. The next prime is 199172053. The reversal of 199172042 is 240271991.

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

It is a junction number, because it is equal to n+sod(n) for n = 199171993 and 199172011.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2164868 + ... + 2164959.

It is an arithmetic number, because the mean of its divisors is an integer number (38968452).

Almost surely, 2^199172042 is an apocalyptic number.

199172042 is a deficient number, since it is larger than the sum of its proper divisors (112575574).

199172042 is a wasteful number, since it uses less digits than its factorization.

199172042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329852.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 199172042 is about 14112.8325292976. The cubic root of 199172042 is about 583.9954435280.

The spelling of 199172042 in words is "one hundred ninety-nine million, one hundred seventy-two thousand, forty-two".