199800193 has 4 divisors (see below), whose sum is σ = 203075668. Its totient is φ = 196524720.

The previous prime is 199800191. The next prime is 199800199. The reversal of 199800193 is 391008991.

199800193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391008991 = 3793 ⋅103087.

It can be written as a sum of positive squares in 2 ways, for example, as 4443664 + 195356529 = 2108^2 + 13977^2 .

It is a cyclic number.

It is not a de Polignac number, because 199800193 - 2¹ = 199800191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199800191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637646 + ... + 1637767.

It is an arithmetic number, because the mean of its divisors is an integer number (50768917).

Almost surely, 2^199800193 is an apocalyptic number.

It is an amenable number.

199800193 is a deficient number, since it is larger than the sum of its proper divisors (3275475).

199800193 is an equidigital number, since it uses as much as digits as its factorization.

199800193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275474.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 199800193 is about 14135.0696142608. The cubic root of 199800193 is about 584.6087363497.

The spelling of 199800193 in words is "one hundred ninety-nine million, eight hundred thousand, one hundred ninety-three".