108091705 has 4 divisors (see below), whose sum is σ = 129710052. Its totient is φ = 86473360.

The previous prime is 108091693. The next prime is 108091727. The reversal of 108091705 is 507190801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52186176 + 55905529 = 7224^2 + 7477^2 .

It is a de Polignac number, because none of the positive numbers 2^k-108091705 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10809166 + ... + 10809175.

It is an arithmetic number, because the mean of its divisors is an integer number (32427513).

Almost surely, 2^108091705 is an apocalyptic number.

It is an amenable number.

108091705 is a deficient number, since it is larger than the sum of its proper divisors (21618347).

108091705 is an equidigital number, since it uses as much as digits as its factorization.

108091705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21618346.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 108091705 is about 10396.7160680669. The cubic root of 108091705 is about 476.3550669145.

The spelling of 108091705 in words is "one hundred eight million, ninety-one thousand, seven hundred five".