1100019889 has 2 divisors, whose sum is σ = 1100019890. Its totient is φ = 1100019888.

The previous prime is 1100019887. The next prime is 1100019911. The reversal of 1100019889 is 9889100011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666672400 + 433347489 = 25820^2 + 20817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100019889 - 2¹ = 1100019887 is a prime.

Together with 1100019887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1100019887) 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 as a sum of consecutive naturals, namely, 550009944 + 550009945.

It is an arithmetic number, because the mean of its divisors is an integer number (550009945).

Almost surely, 2^1100019889 is an apocalyptic number.

It is an amenable number.

1100019889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100019889 is an equidigital number, since it uses as much as digits as its factorization.

1100019889 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1100019889 is about 33166.5477401553. The cubic root of 1100019889 is about 1032.2863369398.

The spelling of 1100019889 in words is "one billion, one hundred million, nineteen thousand, eight hundred eighty-nine".