1085000005 has 4 divisors (see below), whose sum is σ = 1302000012. Its totient is φ = 868000000.

The previous prime is 1084999991. The next prime is 1085000041. The reversal of 1085000005 is 5000005801.

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 371949796 + 713050209 = 19286^2 + 26703^2 .

It is not a de Polignac number, because 1085000005 - 2⁵ = 1084999973 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108499996 + ... + 108500005.

It is an arithmetic number, because the mean of its divisors is an integer number (325500003).

Almost surely, 2^1085000005 is an apocalyptic number.

It is an amenable number.

1085000005 is a deficient number, since it is larger than the sum of its proper divisors (217000007).

1085000005 is an equidigital number, since it uses as much as digits as its factorization.

1085000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217000006.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1085000005 is about 32939.3382598983. The cubic root of 1085000005 is about 1027.5664435300.

Adding to 1085000005 its reverse (5000005801), we get a palindrome (6085005806).

The spelling of 1085000005 in words is "one billion, eighty-five million, five", and thus it is an aban number and an uban number.