489304561 has 2 divisors, whose sum is σ = 489304562. Its totient is φ = 489304560.

The previous prime is 489304547. The next prime is 489304579. The reversal of 489304561 is 165403984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 460746225 + 28558336 = 21465^2 + 5344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489304561 is a prime.

It is not a weakly prime, because it can be changed into another prime (489304061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244652280 + 244652281.

It is an arithmetic number, because the mean of its divisors is an integer number (244652281).

Almost surely, 2^489304561 is an apocalyptic number.

It is an amenable number.

489304561 is a deficient number, since it is larger than the sum of its proper divisors (1).

489304561 is an equidigital number, since it uses as much as digits as its factorization.

489304561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 489304561 is about 22120.2296778311. The cubic root of 489304561 is about 788.0003698668. Note that the first 3 decimals are identical.

The spelling of 489304561 in words is "four hundred eighty-nine million, three hundred four thousand, five hundred sixty-one".