1101100989 has 4 divisors (see below), whose sum is σ = 1468134656. Its totient is φ = 734067324.

The previous prime is 1101100967. The next prime is 1101100993. The reversal of 1101100989 is 9890011011.

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 an emirpimes, since its reverse is a distinct semiprime: 9890011011 = 3 ⋅3296670337.

It is not a de Polignac number, because 1101100989 - 2⁹ = 1101100477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101100289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183516829 + ... + 183516834.

It is an arithmetic number, because the mean of its divisors is an integer number (367033664).

Almost surely, 2^1101100989 is an apocalyptic number.

It is an amenable number.

1101100989 is a deficient number, since it is larger than the sum of its proper divisors (367033667).

1101100989 is an equidigital number, since it uses as much as digits as its factorization.

1101100989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367033666.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 1101100989 is about 33182.8417860797. The cubic root of 1101100989 is about 1032.6244033591.

The spelling of 1101100989 in words is "one billion, one hundred one million, one hundred thousand, nine hundred eighty-nine".