204199117 has 2 divisors, whose sum is σ = 204199118. Its totient is φ = 204199116.

The previous prime is 204199097. The next prime is 204199123. The reversal of 204199117 is 711991402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174398436 + 29800681 = 13206^2 + 5459^2 .

It is a cyclic number.

It is not a de Polignac number, because 204199117 - 2¹¹ = 204197069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204199187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102099558 + 102099559.

It is an arithmetic number, because the mean of its divisors is an integer number (102099559).

Almost surely, 2^204199117 is an apocalyptic number.

It is an amenable number.

204199117 is a deficient number, since it is larger than the sum of its proper divisors (1).

204199117 is an equidigital number, since it uses as much as digits as its factorization.

204199117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 204199117 is about 14289.8256462422. The cubic root of 204199117 is about 588.8679980103.

The spelling of 204199117 in words is "two hundred four million, one hundred ninety-nine thousand, one hundred seventeen".