199644799 has 8 divisors (see below), whose sum is σ = 214118640. Its totient is φ = 185567616.

The previous prime is 199644793. The next prime is 199644827. The reversal of 199644799 is 997446991.

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

It is a cyclic number.

It is not a de Polignac number, because 199644799 - 2⁹ = 199644287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199644793) 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 7 ways as a sum of consecutive naturals, for example, 98122 + ... + 100135.

It is an arithmetic number, because the mean of its divisors is an integer number (26764830).

Almost surely, 2^199644799 is an apocalyptic number.

199644799 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

199644799 is a deficient number, since it is larger than the sum of its proper divisors (14473841).

199644799 is a wasteful number, since it uses less digits than its factorization.

199644799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198329.

The product of its digits is 4408992, while the sum is 58.

The square root of 199644799 is about 14129.5717911053. The cubic root of 199644799 is about 584.4571378115.

The spelling of 199644799 in words is "one hundred ninety-nine million, six hundred forty-four thousand, seven hundred ninety-nine".