1105306805 has 4 divisors (see below), whose sum is σ = 1326368172. Its totient is φ = 884245440.

The previous prime is 1105306801. The next prime is 1105306919. The reversal of 1105306805 is 5086035011.

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 475196401 + 630110404 = 21799^2 + 25102^2 .

It is not a de Polignac number, because 1105306805 - 2² = 1105306801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105306801) 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, 110530676 + ... + 110530685.

It is an arithmetic number, because the mean of its divisors is an integer number (331592043).

Almost surely, 2^1105306805 is an apocalyptic number.

It is an amenable number.

1105306805 is a deficient number, since it is larger than the sum of its proper divisors (221061367).

1105306805 is an equidigital number, since it uses as much as digits as its factorization.

1105306805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221061366.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1105306805 is about 33246.1547400598. The cubic root of 1105306805 is about 1033.9374861659.

The spelling of 1105306805 in words is "one billion, one hundred five million, three hundred six thousand, eight hundred five".