199494243 has 48 divisors (see below), whose sum is σ = 334414080. Its totient is φ = 113545152.

The previous prime is 199494241. The next prime is 199494259. The reversal of 199494243 is 342494991.

It is not a de Polignac number, because 199494243 - 2¹ = 199494241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199494241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94546 + ... + 96632.

It is an arithmetic number, because the mean of its divisors is an integer number (6966960).

Almost surely, 2^199494243 is an apocalyptic number.

199494243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199494243 is a deficient number, since it is larger than the sum of its proper divisors (134919837).

199494243 is a wasteful number, since it uses less digits than its factorization.

199494243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2165 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 199494243 is about 14124.2430947644. The cubic root of 199494243 is about 584.3101840587.

The spelling of 199494243 in words is "one hundred ninety-nine million, four hundred ninety-four thousand, two hundred forty-three".