489490709 has 2 divisors, whose sum is σ = 489490710. Its totient is φ = 489490708.

The previous prime is 489490699. The next prime is 489490721. The reversal of 489490709 is 907094984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479391025 + 10099684 = 21895^2 + 3178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489490709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489490009) 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, 244745354 + 244745355.

It is an arithmetic number, because the mean of its divisors is an integer number (244745355).

Almost surely, 2^489490709 is an apocalyptic number.

It is an amenable number.

489490709 is a deficient number, since it is larger than the sum of its proper divisors (1).

489490709 is an equidigital number, since it uses as much as digits as its factorization.

489490709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 489490709 is about 22124.4369193885. The cubic root of 489490709 is about 788.1002845261.

The spelling of 489490709 in words is "four hundred eighty-nine million, four hundred ninety thousand, seven hundred nine".