108921823 has 4 divisors (see below), whose sum is σ = 109131408. Its totient is φ = 108712240.

The previous prime is 108921811. The next prime is 108921829. The reversal of 108921823 is 328129801.

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 108921823 - 2⁹ = 108921311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108921829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104011 + ... + 105052.

It is an arithmetic number, because the mean of its divisors is an integer number (27282852).

Almost surely, 2^108921823 is an apocalyptic number.

108921823 is a deficient number, since it is larger than the sum of its proper divisors (209585).

108921823 is an equidigital number, since it uses as much as digits as its factorization.

108921823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209584.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 108921823 is about 10436.5618380768. The cubic root of 108921823 is about 477.5713888678.

The spelling of 108921823 in words is "one hundred eight million, nine hundred twenty-one thousand, eight hundred twenty-three".