489699817 has 2 divisors, whose sum is σ = 489699818. Its totient is φ = 489699816.

The previous prime is 489699809. The next prime is 489699827. The reversal of 489699817 is 718996984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316092841 + 173606976 = 17779^2 + 13176^2 .

It is a cyclic number.

It is not a de Polignac number, because 489699817 - 2³ = 489699809 is a prime.

It is not a weakly prime, because it can be changed into another prime (489699827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244849908 + 244849909.

It is an arithmetic number, because the mean of its divisors is an integer number (244849909).

Almost surely, 2^489699817 is an apocalyptic number.

It is an amenable number.

489699817 is a deficient number, since it is larger than the sum of its proper divisors (1).

489699817 is an equidigital number, since it uses as much as digits as its factorization.

489699817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 61.

The square root of 489699817 is about 22129.1621395840. The cubic root of 489699817 is about 788.2124927252.

The spelling of 489699817 in words is "four hundred eighty-nine million, six hundred ninety-nine thousand, eight hundred seventeen".