1159805005 has 4 divisors (see below), whose sum is σ = 1391766012. Its totient is φ = 927844000.

The previous prime is 1159804979. The next prime is 1159805027. The reversal of 1159805005 is 5005089511.

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 371487076 + 788317929 = 19274^2 + 28077^2 .

It is not a de Polignac number, because 1159805005 - 2⁹ = 1159804493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115980496 + ... + 115980505.

It is an arithmetic number, because the mean of its divisors is an integer number (347941503).

Almost surely, 2^1159805005 is an apocalyptic number.

It is an amenable number.

1159805005 is a deficient number, since it is larger than the sum of its proper divisors (231961007).

1159805005 is an equidigital number, since it uses as much as digits as its factorization.

1159805005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231961006.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 1159805005 is about 34055.9099863739. The cubic root of 1159805005 is about 1050.6586962932.

The spelling of 1159805005 in words is "one billion, one hundred fifty-nine million, eight hundred five thousand, five".