204105623 has 2 divisors, whose sum is σ = 204105624. Its totient is φ = 204105622.

The previous prime is 204105607. The next prime is 204105641. The reversal of 204105623 is 326501402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204105623 - 2⁴ = 204105607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204105323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102052811 + 102052812.

It is an arithmetic number, because the mean of its divisors is an integer number (102052812).

Almost surely, 2^204105623 is an apocalyptic number.

204105623 is a deficient number, since it is larger than the sum of its proper divisors (1).

204105623 is an equidigital number, since it uses as much as digits as its factorization.

204105623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 204105623 is about 14286.5539231825. The cubic root of 204105623 is about 588.7781118409.

The spelling of 204105623 in words is "two hundred four million, one hundred five thousand, six hundred twenty-three".