489257009 has 2 divisors, whose sum is σ = 489257010. Its totient is φ = 489257008.

The previous prime is 489256993. The next prime is 489257017. The reversal of 489257009 is 900752984.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370447009 + 118810000 = 19247^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 489257009 - 2⁴ = 489256993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489257089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244628504 + 244628505.

It is an arithmetic number, because the mean of its divisors is an integer number (244628505).

Almost surely, 2^489257009 is an apocalyptic number.

It is an amenable number.

489257009 is a deficient number, since it is larger than the sum of its proper divisors (1).

489257009 is an equidigital number, since it uses as much as digits as its factorization.

489257009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 489257009 is about 22119.1547984999. The cubic root of 489257009 is about 787.9748423389.

The spelling of 489257009 in words is "four hundred eighty-nine million, two hundred fifty-seven thousand, nine".