1198001089 has 4 divisors (see below), whose sum is σ = 1198070320. Its totient is φ = 1197931860.

The previous prime is 1198001081. The next prime is 1198001111. The reversal of 1198001089 is 9801008911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1198001089 - 2³ = 1198001081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1198001081) by changing a digit.

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, 16642 + ... + 51700.

It is an arithmetic number, because the mean of its divisors is an integer number (299517580).

Almost surely, 2^1198001089 is an apocalyptic number.

It is an amenable number.

1198001089 is a deficient number, since it is larger than the sum of its proper divisors (69231).

1198001089 is an equidigital number, since it uses as much as digits as its factorization.

1198001089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69230.

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

The square root of 1198001089 is about 34612.1523312261. The cubic root of 1198001089 is about 1062.0681968376.

The spelling of 1198001089 in words is "one billion, one hundred ninety-eight million, one thousand, eighty-nine".