1105895809 has 4 divisors (see below), whose sum is σ = 1107539716. Its totient is φ = 1104251904.

The previous prime is 1105895803. The next prime is 1105895837. The reversal of 1105895809 is 9085985011.

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 362788209 + 743107600 = 19047^2 + 27260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105895809 - 2¹³ = 1105887617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1105895803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820944 + ... + 822289.

It is an arithmetic number, because the mean of its divisors is an integer number (276884929).

Almost surely, 2^1105895809 is an apocalyptic number.

It is an amenable number.

1105895809 is a deficient number, since it is larger than the sum of its proper divisors (1643907).

1105895809 is an equidigital number, since it uses as much as digits as its factorization.

1105895809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643906.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 1105895809 is about 33255.0117876990. The cubic root of 1105895809 is about 1034.1211109506.

It can be divided in two parts, 1105895 and 809, that added together give a square (1106704 = 1052²).

The spelling of 1105895809 in words is "one billion, one hundred five million, eight hundred ninety-five thousand, eight hundred nine".