1001189089 has 8 divisors (see below), whose sum is σ = 1020801320. Its totient is φ = 981766656.

The previous prime is 1001189083. The next prime is 1001189129. The reversal of 1001189089 is 9809811001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 138768400 + 862420689 = 11780^2 + 29367^2 .

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 1001189089 - 2¹¹ = 1001187041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001189083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36774 + ... + 57919.

It is an arithmetic number, because the mean of its divisors is an integer number (127600165).

Almost surely, 2^1001189089 is an apocalyptic number.

It is an amenable number.

1001189089 is a deficient number, since it is larger than the sum of its proper divisors (19612231).

1001189089 is an equidigital number, since it uses as much as digits as its factorization.

1001189089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94899.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 1001189089 is about 31641.5721638480. The cubic root of 1001189089 is about 1000.3962060001.

The spelling of 1001189089 in words is "one billion, one million, one hundred eighty-nine thousand, eighty-nine".