489823 has 2 divisors, whose sum is σ = 489824. Its totient is φ = 489822.

The previous prime is 489817. The next prime is 489833. The reversal of 489823 is 328984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489823 - 2⁵ = 489791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244911 + 244912.

It is an arithmetic number, because the mean of its divisors is an integer number (244912).

2⁴⁸⁹⁸²³ is an apocalyptic number.

489823 is a deficient number, since it is larger than the sum of its proper divisors (1).

489823 is an equidigital number, since it uses as much as digits as its factorization.

489823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 489823 is about 699.8735600092. The cubic root of 489823 is about 78.8278578271.

The spelling of 489823 in words is "four hundred eighty-nine thousand, eight hundred twenty-three".