199641743 has 16 divisors (see below), whose sum is σ = 231310080. Its totient is φ = 168778176.

The previous prime is 199641691. The next prime is 199641763. The reversal of 199641743 is 347146991.

It is not a de Polignac number, because 199641743 - 2¹⁴ = 199625359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199641694 and 199641703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199641763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171080 + ... + 172242.

It is an arithmetic number, because the mean of its divisors is an integer number (14456880).

Almost surely, 2^199641743 is an apocalyptic number.

199641743 is a deficient number, since it is larger than the sum of its proper divisors (31668337).

199641743 is a wasteful number, since it uses less digits than its factorization.

199641743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486.

The product of its digits is 163296, while the sum is 44.

The square root of 199641743 is about 14129.4636487023. The cubic root of 199641743 is about 584.4541556650.

The spelling of 199641743 in words is "one hundred ninety-nine million, six hundred forty-one thousand, seven hundred forty-three".