205134199 has 4 divisors (see below), whose sum is σ = 205241400. Its totient is φ = 205027000.

The previous prime is 205134169. The next prime is 205134227. The reversal of 205134199 is 991431502.

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

It is a cyclic number.

It is not a de Polignac number, because 205134199 - 2⁷ = 205134071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205134109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50677 + ... + 54574.

It is an arithmetic number, because the mean of its divisors is an integer number (51310350).

Almost surely, 2^205134199 is an apocalyptic number.

205134199 is a deficient number, since it is larger than the sum of its proper divisors (107201).

205134199 is a wasteful number, since it uses less digits than its factorization.

205134199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107200.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 205134199 is about 14322.5067289214. The cubic root of 205134199 is about 589.7654904455.

The spelling of 205134199 in words is "two hundred five million, one hundred thirty-four thousand, one hundred ninety-nine".