823489 has 2 divisors, whose sum is σ = 823490. Its totient is φ = 823488.

The previous prime is 823483. The next prime is 823499. The reversal of 823489 is 984328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 129600 = 833^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 823489 - 2³ = 823481 is a prime.

It is not a weakly prime, because it can be changed into another prime (823481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411744 + 411745.

It is an arithmetic number, because the mean of its divisors is an integer number (411745).

2⁸²³⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

823489 is a deficient number, since it is larger than the sum of its proper divisors (1).

823489 is an equidigital number, since it uses as much as digits as its factorization.

823489 is an odious number, because the sum of its binary digits is odd.

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

The square root of 823489 is about 907.4629469020. The cubic root of 823489 is about 93.7315791956.

The spelling of 823489 in words is "eight hundred twenty-three thousand, four hundred eighty-nine".