489345809 has 2 divisors, whose sum is σ = 489345810. Its totient is φ = 489345808.

The previous prime is 489345803. The next prime is 489345827. The reversal of 489345809 is 908543984.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307230784 + 182115025 = 17528^2 + 13495^2 .

It is a cyclic number.

It is not a de Polignac number, because 489345809 - 2⁸ = 489345553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489345803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244672904 + 244672905.

It is an arithmetic number, because the mean of its divisors is an integer number (244672905).

Almost surely, 2^489345809 is an apocalyptic number.

It is an amenable number.

489345809 is a deficient number, since it is larger than the sum of its proper divisors (1).

489345809 is an equidigital number, since it uses as much as digits as its factorization.

489345809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 489345809 is about 22121.1620173986. The cubic root of 489345809 is about 788.0225118540.

The spelling of 489345809 in words is "four hundred eighty-nine million, three hundred forty-five thousand, eight hundred nine".