204420589 has 2 divisors, whose sum is σ = 204420590. Its totient is φ = 204420588.

The previous prime is 204420583. The next prime is 204420649. The reversal of 204420589 is 985024402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157703364 + 46717225 = 12558^2 + 6835^2 .

It is a cyclic number.

It is not a de Polignac number, because 204420589 - 2⁹ = 204420077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204420583) 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, 102210294 + 102210295.

It is an arithmetic number, because the mean of its divisors is an integer number (102210295).

Almost surely, 2^204420589 is an apocalyptic number.

It is an amenable number.

204420589 is a deficient number, since it is larger than the sum of its proper divisors (1).

204420589 is an equidigital number, since it uses as much as digits as its factorization.

204420589 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 34.

The square root of 204420589 is about 14297.5728359746. The cubic root of 204420589 is about 589.0808142289.

The spelling of 204420589 in words is "two hundred four million, four hundred twenty thousand, five hundred eighty-nine".