204454123 has 2 divisors, whose sum is σ = 204454124. Its totient is φ = 204454122.

The previous prime is 204454111. The next prime is 204454139. The reversal of 204454123 is 321454402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204454123 - 2¹³ = 204445931 is a prime.

It is equal to p_11311846 and since 204454123 and 11311846 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (204454163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102227061 + 102227062.

It is an arithmetic number, because the mean of its divisors is an integer number (102227062).

Almost surely, 2^204454123 is an apocalyptic number.

204454123 is a deficient number, since it is larger than the sum of its proper divisors (1).

204454123 is an equidigital number, since it uses as much as digits as its factorization.

204454123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204454123 is about 14298.7455044140. The cubic root of 204454123 is about 589.1130242198.

The spelling of 204454123 in words is "two hundred four million, four hundred fifty-four thousand, one hundred twenty-three".