199999983 has 8 divisors (see below), whose sum is σ = 266807296. Its totient is φ = 133263000.

The previous prime is 199999963. The next prime is 199999991. The reversal of 199999983 is 389999991.

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

It is not a de Polignac number, because 199999983 - 2¹⁶ = 199934447 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 (199999903) 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, 10543 + ... + 22608.

It is an arithmetic number, because the mean of its divisors is an integer number (33350912).

Almost surely, 2^199999983 is an apocalyptic number.

199999983 is a deficient number, since it is larger than the sum of its proper divisors (66807313).

199999983 is a wasteful number, since it uses less digits than its factorization.

199999983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35165.

The product of its digits is 12754584, while the sum is 66.

The square root of 199999983 is about 14142.1350226902. The cubic root of 199999983 is about 584.8035310731.

The spelling of 199999983 in words is "one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-three".