199939047 has 16 divisors (see below), whose sum is σ = 332366592. Its totient is φ = 103864320.

The previous prime is 199939039. The next prime is 199939063. The reversal of 199939047 is 740939991.

It is not a de Polignac number, because 199939047 - 2³ = 199939039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199939007) 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, 432538 + ... + 432999.

It is an arithmetic number, because the mean of its divisors is an integer number (20772912).

Almost surely, 2^199939047 is an apocalyptic number.

199939047 is a deficient number, since it is larger than the sum of its proper divisors (132427545).

199939047 is a wasteful number, since it uses less digits than its factorization.

199939047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865558.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 199939047 is about 14139.9804455310. The cubic root of 199939047 is about 584.7441323885.

The spelling of 199939047 in words is "one hundred ninety-nine million, nine hundred thirty-nine thousand, forty-seven".