823385 has 4 divisors (see below), whose sum is σ = 988068. Its totient is φ = 658704.

The previous prime is 823373. The next prime is 823399. The reversal of 823385 is 583328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 524176 + 299209 = 724^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 823385 - 2⁸ = 823129 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82334 + ... + 82343.

It is an arithmetic number, because the mean of its divisors is an integer number (247017).

2⁸²³³⁸⁵ is an apocalyptic number.

It is an amenable number.

823385 is a deficient number, since it is larger than the sum of its proper divisors (164683).

823385 is a wasteful number, since it uses less digits than its factorization.

823385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164682.

The product of its digits is 5760, while the sum is 29.

The square root of 823385 is about 907.4056424775. The cubic root of 823385 is about 93.7276331827.

The spelling of 823385 in words is "eight hundred twenty-three thousand, three hundred eighty-five".