108005821 has 8 divisors (see below), whose sum is σ = 134656704. Its totient is φ = 84160320.

The previous prime is 108005819. The next prime is 108005827. The reversal of 108005821 is 128500801.

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 108005821 - 2¹ = 108005819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108005827) 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, 701260 + ... + 701413.

It is an arithmetic number, because the mean of its divisors is an integer number (16832088).

Almost surely, 2^108005821 is an apocalyptic number.

108005821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108005821 is a deficient number, since it is larger than the sum of its proper divisors (26650883).

108005821 is a wasteful number, since it uses less digits than its factorization.

108005821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402691.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 108005821 is about 10392.5849046327. The cubic root of 108005821 is about 476.2288712345.

The spelling of 108005821 in words is "one hundred eight million, five thousand, eight hundred twenty-one".