108437209 has 2 divisors, whose sum is σ = 108437210. Its totient is φ = 108437208.

The previous prime is 108437207. The next prime is 108437261. The reversal of 108437209 is 902734801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102961609 + 5475600 = 10147^2 + 2340^2 .

It is an emirp because it is prime and its reverse (902734801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108437209 - 2¹ = 108437207 is a prime.

Together with 108437207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (108437201) 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, 54218604 + 54218605.

It is an arithmetic number, because the mean of its divisors is an integer number (54218605).

Almost surely, 2^108437209 is an apocalyptic number.

It is an amenable number.

108437209 is a deficient number, since it is larger than the sum of its proper divisors (1).

108437209 is an equidigital number, since it uses as much as digits as its factorization.

108437209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 108437209 is about 10413.3188273480. The cubic root of 108437209 is about 476.8620670730.

The spelling of 108437209 in words is "one hundred eight million, four hundred thirty-seven thousand, two hundred nine".