109823 has 8 divisors (see below), whose sum is σ = 130080. Its totient is φ = 90720.

The previous prime is 109819. The next prime is 109829. The reversal of 109823 is 328901.

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

It is not a de Polignac number, because 109823 - 2² = 109819 is a prime.

It is a super-2 number, since 2×109823² = 24122182658, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109829) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (16260).

2¹⁰⁹⁸²³ is an apocalyptic number.

109823 is a deficient number, since it is larger than the sum of its proper divisors (20257).

109823 is an equidigital number, since it uses as much as digits as its factorization.

109823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577.

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

The square root of 109823 is about 331.3955340677. The cubic root of 109823 is about 47.8884853403. Note that the first 3 decimals are identical.

The spelling of 109823 in words is "one hundred nine thousand, eight hundred twenty-three".