204199123 has 2 divisors, whose sum is σ = 204199124. Its totient is φ = 204199122.

The previous prime is 204199117. The next prime is 204199159. The reversal of 204199123 is 321991402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204199123 - 2⁵ = 204199091 is a prime.

It is not a weakly prime, because it can be changed into another prime (204199423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102099561 + 102099562.

It is an arithmetic number, because the mean of its divisors is an integer number (102099562).

Almost surely, 2^204199123 is an apocalyptic number.

204199123 is a deficient number, since it is larger than the sum of its proper divisors (1).

204199123 is an equidigital number, since it uses as much as digits as its factorization.

204199123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 204199123 is about 14289.8258561817. The cubic root of 204199123 is about 588.8680037779.

The spelling of 204199123 in words is "two hundred four million, one hundred ninety-nine thousand, one hundred twenty-three".