11809105 has 32 divisors (see below), whose sum is σ = 18167040. Its totient is φ = 7153920.

The previous prime is 11809103. The next prime is 11809111. The reversal of 11809105 is 50190811.

It is not a de Polignac number, because 11809105 - 2¹ = 11809103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11809105.

It is not an unprimeable number, because it can be changed into a prime (11809103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13831 + ... + 14659.

It is an arithmetic number, because the mean of its divisors is an integer number (567720).

Almost surely, 2^11809105 is an apocalyptic number.

It is an amenable number.

11809105 is a deficient number, since it is larger than the sum of its proper divisors (6357935).

11809105 is a wasteful number, since it uses less digits than its factorization.

11809105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 11809105 is about 3436.4378358993. The cubic root of 11809105 is about 227.7223523460.

Adding to 11809105 its reverse (50190811), we get a palindrome (61999916).

The spelling of 11809105 in words is "eleven million, eight hundred nine thousand, one hundred five".