199389042 has 12 divisors (see below), whose sum is σ = 432009630. Its totient is φ = 66463008.

The previous prime is 199389023. The next prime is 199389067. The reversal of 199389042 is 240983991.

It can be written as a sum of positive squares in only one way, i.e., 175271121 + 24117921 = 13239^2 + 4911^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5538567 + ... + 5538602.

Almost surely, 2^199389042 is an apocalyptic number.

199389042 is an abundant number, since it is smaller than the sum of its proper divisors (232620588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199389042 is a wasteful number, since it uses less digits than its factorization.

199389042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11077177 (or 11077174 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 199389042 is about 14120.5184749003. The cubic root of 199389042 is about 584.2074562421.

The spelling of 199389042 in words is "one hundred ninety-nine million, three hundred eighty-nine thousand, forty-two".