199723743 has 48 divisors (see below), whose sum is σ = 313709760. Its totient is φ = 122107392.

The previous prime is 199723721. The next prime is 199723747. The reversal of 199723743 is 347327991.

It is not a de Polignac number, because 199723743 - 2²⁴ = 182946527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199723747) 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 47 ways as a sum of consecutive naturals, for example, 681505 + ... + 681797.

It is an arithmetic number, because the mean of its divisors is an integer number (6535620).

Almost surely, 2^199723743 is an apocalyptic number.

199723743 is a deficient number, since it is larger than the sum of its proper divisors (113986017).

199723743 is a wasteful number, since it uses less digits than its factorization.

199723743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 445 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 199723743 is about 14132.3650886892. The cubic root of 199723743 is about 584.5341634496.

The spelling of 199723743 in words is "one hundred ninety-nine million, seven hundred twenty-three thousand, seven hundred forty-three".