204867001 has 2 divisors, whose sum is σ = 204867002. Its totient is φ = 204867000.

The previous prime is 204866999. The next prime is 204867011. The reversal of 204867001 is 100768402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193877776 + 10989225 = 13924^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 204867001 - 2¹ = 204866999 is a prime.

Together with 204866999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204867011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102433500 + 102433501.

It is an arithmetic number, because the mean of its divisors is an integer number (102433501).

Almost surely, 2^204867001 is an apocalyptic number.

It is an amenable number.

204867001 is a deficient number, since it is larger than the sum of its proper divisors (1).

204867001 is an equidigital number, since it uses as much as digits as its factorization.

204867001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 204867001 is about 14313.1757831726. The cubic root of 204867001 is about 589.5093124079.

The spelling of 204867001 in words is "two hundred four million, eight hundred sixty-seven thousand, one".