823115 has 4 divisors (see below), whose sum is σ = 987744. Its totient is φ = 658488.

The previous prime is 823051. The next prime is 823117. The reversal of 823115 is 511328.

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 823115 - 2⁶ = 823051 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 823115.

It is not an unprimeable number, because it can be changed into a prime (823117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82307 + ... + 82316.

It is an arithmetic number, because the mean of its divisors is an integer number (246936).

2⁸²³¹¹⁵ is an apocalyptic number.

823115 is a deficient number, since it is larger than the sum of its proper divisors (164629).

823115 is a wasteful number, since it uses less digits than its factorization.

823115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164628.

The product of its digits is 240, while the sum is 20.

The square root of 823115 is about 907.2568544795. The cubic root of 823115 is about 93.7173871748.

The spelling of 823115 in words is "eight hundred twenty-three thousand, one hundred fifteen".