1131135805 has 8 divisors (see below), whose sum is σ = 1382973912. Its totient is φ = 887834688.

The previous prime is 1131135773. The next prime is 1131135823. The reversal of 1131135805 is 5085311311.

It can be written as a sum of positive squares in 4 ways, for example, as 609744249 + 521391556 = 24693^2 + 22834^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1131135805 - 2⁵ = 1131135773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133954 + ... + 2134483.

It is an arithmetic number, because the mean of its divisors is an integer number (172871739).

Almost surely, 2^1131135805 is an apocalyptic number.

It is an amenable number.

1131135805 is a deficient number, since it is larger than the sum of its proper divisors (251838107).

1131135805 is an equidigital number, since it uses as much as digits as its factorization.

1131135805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268495.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1131135805 is about 33632.3624653398. The cubic root of 1131135805 is about 1041.9292975189.

The spelling of 1131135805 in words is "one billion, one hundred thirty-one million, one hundred thirty-five thousand, eight hundred five".