199055639 has 8 divisors (see below), whose sum is σ = 207853152. Its totient is φ = 190270080.

The previous prime is 199055621. The next prime is 199055677. The reversal of 199055639 is 936550991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199055639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199055593 and 199055602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199055699) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56267 + ... + 59699.

It is an arithmetic number, because the mean of its divisors is an integer number (25981644).

Almost surely, 2^199055639 is an apocalyptic number.

199055639 is a deficient number, since it is larger than the sum of its proper divisors (8797513).

199055639 is a wasteful number, since it uses less digits than its factorization.

199055639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5977.

The product of its (nonzero) digits is 328050, while the sum is 47.

The square root of 199055639 is about 14108.7079139091. The cubic root of 199055639 is about 583.8816523414.

The spelling of 199055639 in words is "one hundred ninety-nine million, fifty-five thousand, six hundred thirty-nine".