823109 has 8 divisors (see below), whose sum is σ = 957120. Its totient is φ = 693216.

The previous prime is 823051. The next prime is 823117. The reversal of 823109 is 901328.

823109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 823109 - 2⁸ = 822853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823129) 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, 584 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (119640).

2⁸²³¹⁰⁹ is an apocalyptic number.

It is an amenable number.

823109 is a deficient number, since it is larger than the sum of its proper divisors (134011).

823109 is a wasteful number, since it uses less digits than its factorization.

823109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 823109 is about 907.2535478024. The cubic root of 823109 is about 93.7171594603.

The spelling of 823109 in words is "eight hundred twenty-three thousand, one hundred nine".