108089809 has 2 divisors, whose sum is σ = 108089810. Its totient is φ = 108089808.

The previous prime is 108089789. The next prime is 108089851. The reversal of 108089809 is 908980801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97219600 + 10870209 = 9860^2 + 3297^2 .

It is a cyclic number.

It is not a de Polignac number, because 108089809 - 2¹⁷ = 107958737 is a prime.

It is not a weakly prime, because it can be changed into another prime (108089609) 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 as a sum of consecutive naturals, namely, 54044904 + 54044905.

It is an arithmetic number, because the mean of its divisors is an integer number (54044905).

Almost surely, 2^108089809 is an apocalyptic number.

It is an amenable number.

108089809 is a deficient number, since it is larger than the sum of its proper divisors (1).

108089809 is an equidigital number, since it uses as much as digits as its factorization.

108089809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 43.

The square root of 108089809 is about 10396.6248850288. The cubic root of 108089809 is about 476.3522817039.

The spelling of 108089809 in words is "one hundred eight million, eighty-nine thousand, eight hundred nine".