108820209 has 32 divisors (see below), whose sum is σ = 154828800. Its totient is φ = 67878720.

The previous prime is 108820207. The next prime is 108820223. The reversal of 108820209 is 902028801.

It is not a de Polignac number, because 108820209 - 2¹ = 108820207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108820207) 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 31 ways as a sum of consecutive naturals, for example, 487872 + ... + 488094.

It is an arithmetic number, because the mean of its divisors is an integer number (4838400).

Almost surely, 2^108820209 is an apocalyptic number.

It is an amenable number.

108820209 is a deficient number, since it is larger than the sum of its proper divisors (46008591).

108820209 is a wasteful number, since it uses less digits than its factorization.

108820209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 108820209 is about 10431.6925280608. The cubic root of 108820209 is about 477.4228326639.

The spelling of 108820209 in words is "one hundred eight million, eight hundred twenty thousand, two hundred nine".