108199909 has 8 divisors (see below), whose sum is σ = 110620152. Its totient is φ = 105800640.

The previous prime is 108199867. The next prime is 108199933. The reversal of 108199909 is 909991801.

It can be written as a sum of positive squares in 4 ways, for example, as 1387684 + 106812225 = 1178^2 + 10335^2 .

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 108199909 - 2⁹ = 108199397 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 (108199939) 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 7 ways as a sum of consecutive naturals, for example, 5427 + ... + 15679.

It is an arithmetic number, because the mean of its divisors is an integer number (13827519).

Almost surely, 2^108199909 is an apocalyptic number.

It is an amenable number.

108199909 is a deficient number, since it is larger than the sum of its proper divisors (2420243).

108199909 is a wasteful number, since it uses less digits than its factorization.

108199909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 108199909 is about 10401.9185249645. The cubic root of 108199909 is about 476.5139638875.

The spelling of 108199909 in words is "one hundred eight million, one hundred ninety-nine thousand, nine hundred nine".