199544543 has 4 divisors (see below), whose sum is σ = 217684968. Its totient is φ = 181404120.

The previous prime is 199544531. The next prime is 199544561. The reversal of 199544543 is 345445991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199544543 - 2¹⁴ = 199528159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199544494 and 199544503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199544243) 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 3 ways as a sum of consecutive naturals, for example, 9070196 + ... + 9070217.

It is an arithmetic number, because the mean of its divisors is an integer number (54421242).

Almost surely, 2^199544543 is an apocalyptic number.

199544543 is a deficient number, since it is larger than the sum of its proper divisors (18140425).

199544543 is a wasteful number, since it uses less digits than its factorization.

199544543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140424.

The product of its digits is 388800, while the sum is 44.

The square root of 199544543 is about 14126.0236089283. The cubic root of 199544543 is about 584.3592887880.

The spelling of 199544543 in words is "one hundred ninety-nine million, five hundred forty-four thousand, five hundred forty-three".