199724052743 has 4 divisors (see below), whose sum is σ = 199725035088. Its totient is φ = 199723070400.

The previous prime is 199724052721. The next prime is 199724052751. The reversal of 199724052743 is 347250427991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 199724052743 - 2¹⁰ = 199724051719 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 (199724052443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60083 + ... + 634868.

It is an arithmetic number, because the mean of its divisors is an integer number (49931258772).

Almost surely, 2^199724052743 is an apocalyptic number.

199724052743 is a deficient number, since it is larger than the sum of its proper divisors (982345).

199724052743 is an equidigital number, since it uses as much as digits as its factorization.

199724052743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982344.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 199724052743 in words is "one hundred ninety-nine billion, seven hundred twenty-four million, fifty-two thousand, seven hundred forty-three".