199919133 has 12 divisors (see below), whose sum is σ = 305758908. Its totient is φ = 125439360.

The previous prime is 199919129. The next prime is 199919149. The reversal of 199919133 is 331919991.

It can be written as a sum of positive squares in 2 ways, for example, as 116251524 + 83667609 = 10782^2 + 9147^2 .

It is not a de Polignac number, because 199919133 - 2² = 199919129 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199919123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 653178 + ... + 653483.

It is an arithmetic number, because the mean of its divisors is an integer number (25479909).

Almost surely, 2^199919133 is an apocalyptic number.

It is an amenable number.

199919133 is a deficient number, since it is larger than the sum of its proper divisors (105839775).

199919133 is a wasteful number, since it uses less digits than its factorization.

199919133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306684 (or 1306681 counting only the distinct ones).

The product of its digits is 59049, while the sum is 45.

The square root of 199919133 is about 14139.2762544622. The cubic root of 199919133 is about 584.7247181696.

The spelling of 199919133 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, one hundred thirty-three".