100909105 has 16 divisors (see below), whose sum is σ = 133964928. Its totient is φ = 72352000.

The previous prime is 100909103. The next prime is 100909111. The reversal of 100909105 is 501909001.

It is not a de Polignac number, because 100909105 - 2¹ = 100909103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100909105.

It is not an unprimeable number, because it can be changed into a prime (100909103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9016 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (8372808).

Almost surely, 2^100909105 is an apocalyptic number.

It is an amenable number.

100909105 is a deficient number, since it is larger than the sum of its proper divisors (33055823).

100909105 is a wasteful number, since it uses less digits than its factorization.

100909105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25928.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 100909105 is about 10045.3524079546. The cubic root of 100909105 is about 465.5612062505.

The spelling of 100909105 in words is "one hundred million, nine hundred nine thousand, one hundred five".