823985 has 8 divisors (see below), whose sum is σ = 994560. Its totient is φ = 655344.

The previous prime is 823981. The next prime is 823993. The reversal of 823985 is 589328.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 823985 - 2² = 823981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (823981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (124320).

2⁸²³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

823985 is a deficient number, since it is larger than the sum of its proper divisors (170575).

823985 is a wasteful number, since it uses less digits than its factorization.

823985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967.

The product of its digits is 17280, while the sum is 35.

The square root of 823985 is about 907.7361951580. The cubic root of 823985 is about 93.7503940724.

The spelling of 823985 in words is "eight hundred twenty-three thousand, nine hundred eighty-five".