1121990089 has 8 divisors (see below), whose sum is σ = 1295988768. Its totient is φ = 959991360.

The previous prime is 1121990081. The next prime is 1121990101. The reversal of 1121990089 is 9800991211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121990089 - 2³ = 1121990081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121990081) 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 7 ways as a sum of consecutive naturals, for example, 2999787 + ... + 3000160.

It is an arithmetic number, because the mean of its divisors is an integer number (161998596).

Almost surely, 2^1121990089 is an apocalyptic number.

It is an amenable number.

1121990089 is a deficient number, since it is larger than the sum of its proper divisors (173998679).

1121990089 is a wasteful number, since it uses less digits than its factorization.

1121990089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999975.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 1121990089 is about 33496.1205067094. The cubic root of 1121990089 is about 1039.1135472156.

The spelling of 1121990089 in words is "one billion, one hundred twenty-one million, nine hundred ninety thousand, eighty-nine".