108195905 has 8 divisors (see below), whose sum is σ = 137472552. Its totient is φ = 81465088.

The previous prime is 108195889. The next prime is 108195917. The reversal of 108195905 is 509591801.

It can be written as a sum of positive squares in 4 ways, for example, as 4787344 + 103408561 = 2188^2 + 10169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 108195905 - 2⁴ = 108195889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636362 + ... + 636531.

It is an arithmetic number, because the mean of its divisors is an integer number (17184069).

Almost surely, 2^108195905 is an apocalyptic number.

It is an amenable number.

108195905 is a deficient number, since it is larger than the sum of its proper divisors (29276647).

108195905 is a wasteful number, since it uses less digits than its factorization.

108195905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272915.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 108195905 is about 10401.7260586885. The cubic root of 108195905 is about 476.5080859237.

The spelling of 108195905 in words is "one hundred eight million, one hundred ninety-five thousand, nine hundred five".