199743743 has 2 divisors, whose sum is σ = 199743744. Its totient is φ = 199743742.

The previous prime is 199743703. The next prime is 199743763. The reversal of 199743743 is 347347991.

It is a strong prime.

It is an emirp because it is prime and its reverse (347347991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199743743 - 2¹⁶ = 199678207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199743703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99871871 + 99871872.

It is an arithmetic number, because the mean of its divisors is an integer number (99871872).

Almost surely, 2^199743743 is an apocalyptic number.

199743743 is a deficient number, since it is larger than the sum of its proper divisors (1).

199743743 is an equidigital number, since it uses as much as digits as its factorization.

199743743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 199743743 is about 14133.0726666214. The cubic root of 199743743 is about 584.5536742213.

The spelling of 199743743 in words is "one hundred ninety-nine million, seven hundred forty-three thousand, seven hundred forty-three".