489817 has 2 divisors, whose sum is σ = 489818. Its totient is φ = 489816.

The previous prime is 489803. The next prime is 489823. The reversal of 489817 is 718984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292681 + 197136 = 541^2 + 444^2 .

It is a cyclic number.

It is not a de Polignac number, because 489817 - 2⁷ = 489689 is a prime.

It is not a weakly prime, because it can be changed into another prime (489847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244908 + 244909.

It is an arithmetic number, because the mean of its divisors is an integer number (244909).

2⁴⁸⁹⁸¹⁷ is an apocalyptic number.

It is an amenable number.

489817 is a deficient number, since it is larger than the sum of its proper divisors (1).

489817 is an equidigital number, since it uses as much as digits as its factorization.

489817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 489817 is about 699.8692735076. The cubic root of 489817 is about 78.8275359632.

The spelling of 489817 in words is "four hundred eighty-nine thousand, eight hundred seventeen".