199161793 has 4 divisors (see below), whose sum is σ = 199322500. Its totient is φ = 199001088.

The previous prime is 199161791. The next prime is 199161803. The reversal of 199161793 is 397161991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 156950784 + 42211009 = 12528^2 + 6497^2 .

It is a cyclic number.

It is not a de Polignac number, because 199161793 - 2¹ = 199161791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199161791) 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, 78480 + ... + 80977.

It is an arithmetic number, because the mean of its divisors is an integer number (49830625).

Almost surely, 2^199161793 is an apocalyptic number.

It is an amenable number.

199161793 is a deficient number, since it is larger than the sum of its proper divisors (160707).

199161793 is a wasteful number, since it uses less digits than its factorization.

199161793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160706.

The product of its digits is 91854, while the sum is 46.

The square root of 199161793 is about 14112.4694153787. The cubic root of 199161793 is about 583.9854262720.

The spelling of 199161793 in words is "one hundred ninety-nine million, one hundred sixty-one thousand, seven hundred ninety-three".