823135 has 4 divisors (see below), whose sum is σ = 987768. Its totient is φ = 658504.

The previous prime is 823129. The next prime is 823153. The reversal of 823135 is 531328.

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

It is a cyclic number.

It is not a de Polignac number, because 823135 - 2³ = 823127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 82309 + ... + 82318.

It is an arithmetic number, because the mean of its divisors is an integer number (246942).

2⁸²³¹³⁵ is an apocalyptic number.

823135 is a deficient number, since it is larger than the sum of its proper divisors (164633).

823135 is a wasteful number, since it uses less digits than its factorization.

823135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164632.

The product of its digits is 720, while the sum is 22.

The square root of 823135 is about 907.2678766494. The cubic root of 823135 is about 93.7181462152.

The spelling of 823135 in words is "eight hundred twenty-three thousand, one hundred thirty-five".