489871 has 2 divisors, whose sum is σ = 489872. Its totient is φ = 489870.

The previous prime is 489869. The next prime is 489887. The reversal of 489871 is 178984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489871 - 2¹ = 489869 is a prime.

Together with 489869, it forms a pair of twin primes.

489871 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 489871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489851) 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, 244935 + 244936.

It is an arithmetic number, because the mean of its divisors is an integer number (244936).

2⁴⁸⁹⁸⁷¹ is an apocalyptic number.

489871 is a deficient number, since it is larger than the sum of its proper divisors (1).

489871 is an equidigital number, since it uses as much as digits as its factorization.

489871 is an odious number, because the sum of its binary digits is odd.

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

The square root of 489871 is about 699.9078510776. The cubic root of 489871 is about 78.8304326440.

The spelling of 489871 in words is "four hundred eighty-nine thousand, eight hundred seventy-one".