108821423 has 4 divisors (see below), whose sum is σ = 109081560. Its totient is φ = 108561288.

The previous prime is 108821413. The next prime is 108821431. The reversal of 108821423 is 324128801.

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 108821423 - 2¹² = 108817327 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 (108821413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129440 + ... + 130277.

It is an arithmetic number, because the mean of its divisors is an integer number (27270390).

Almost surely, 2^108821423 is an apocalyptic number.

108821423 is a deficient number, since it is larger than the sum of its proper divisors (260137).

108821423 is an equidigital number, since it uses as much as digits as its factorization.

108821423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260136.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 108821423 is about 10431.7507159633. The cubic root of 108821423 is about 477.4246080362.

The spelling of 108821423 in words is "one hundred eight million, eight hundred twenty-one thousand, four hundred twenty-three".