204254891 has 2 divisors, whose sum is σ = 204254892. Its totient is φ = 204254890.

The previous prime is 204254887. The next prime is 204254923. The reversal of 204254891 is 198452402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204254891 - 2² = 204254887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204254821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102127445 + 102127446.

It is an arithmetic number, because the mean of its divisors is an integer number (102127446).

Almost surely, 2^204254891 is an apocalyptic number.

204254891 is a deficient number, since it is larger than the sum of its proper divisors (1).

204254891 is an equidigital number, since it uses as much as digits as its factorization.

204254891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 204254891 is about 14291.7770413619. Note that the first 3 decimals coincide. The cubic root of 204254891 is about 588.9216066879.

The spelling of 204254891 in words is "two hundred four million, two hundred fifty-four thousand, eight hundred ninety-one".