108505913 has 2 divisors, whose sum is σ = 108505914. Its totient is φ = 108505912.

The previous prime is 108505909. The next prime is 108505931. The reversal of 108505913 is 319505801.

Together with next prime (108505931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92409769 + 16096144 = 9613^2 + 4012^2 .

It is an emirp because it is prime and its reverse (319505801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108505913 - 2² = 108505909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 108505913.

It is not a weakly prime, because it can be changed into another prime (108505933) 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, 54252956 + 54252957.

It is an arithmetic number, because the mean of its divisors is an integer number (54252957).

Almost surely, 2^108505913 is an apocalyptic number.

It is an amenable number.

108505913 is a deficient number, since it is larger than the sum of its proper divisors (1).

108505913 is an equidigital number, since it uses as much as digits as its factorization.

108505913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 108505913 is about 10416.6171572157. The cubic root of 108505913 is about 476.9627564181.

The spelling of 108505913 in words is "one hundred eight million, five hundred five thousand, nine hundred thirteen".