1089605005 has 8 divisors (see below), whose sum is σ = 1332196632. Its totient is φ = 855236928.

The previous prime is 1089604991. The next prime is 1089605047. The reversal of 1089605005 is 5005069801.

It can be written as a sum of positive squares in 4 ways, for example, as 59259204 + 1030345801 = 7698^2 + 32099^2 .

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 1089605005 - 2⁷ = 1089604877 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 7 ways as a sum of consecutive naturals, for example, 2055594 + ... + 2056123.

It is an arithmetic number, because the mean of its divisors is an integer number (166524579).

Almost surely, 2^1089605005 is an apocalyptic number.

It is an amenable number.

1089605005 is a deficient number, since it is larger than the sum of its proper divisors (242591627).

1089605005 is an equidigital number, since it uses as much as digits as its factorization.

1089605005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111775.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 1089605005 is about 33009.1654696086. The cubic root of 1089605005 is about 1029.0181377514.

The spelling of 1089605005 in words is "one billion, eighty-nine million, six hundred five thousand, five".