108216109 has 2 divisors, whose sum is σ = 108216110. Its totient is φ = 108216108.

The previous prime is 108216107. The next prime is 108216187. The reversal of 108216109 is 901612801.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73051209 + 35164900 = 8547^2 + 5930^2 .

It is a cyclic number.

It is not a de Polignac number, because 108216109 - 2¹ = 108216107 is a prime.

Together with 108216107, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108216103) 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 as a sum of consecutive naturals, namely, 54108054 + 54108055.

It is an arithmetic number, because the mean of its divisors is an integer number (54108055).

Almost surely, 2^108216109 is an apocalyptic number.

It is an amenable number.

108216109 is a deficient number, since it is larger than the sum of its proper divisors (1).

108216109 is an equidigital number, since it uses as much as digits as its factorization.

108216109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 108216109 is about 10402.6971983231. The cubic root of 108216109 is about 476.5377443788.

The spelling of 108216109 in words is "one hundred eight million, two hundred sixteen thousand, one hundred nine".