1089888889 has 2 divisors, whose sum is σ = 1089888890. Its totient is φ = 1089888888.

The previous prime is 1089888883. The next prime is 1089888901. The reversal of 1089888889 is 9888889801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929030400 + 160858489 = 30480^2 + 12683^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089888889 - 2³ = 1089888881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1089888881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544944444 + 544944445.

It is an arithmetic number, because the mean of its divisors is an integer number (544944445).

Almost surely, 2^1089888889 is an apocalyptic number.

It is an amenable number.

1089888889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089888889 is an equidigital number, since it uses as much as digits as its factorization.

1089888889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21233664, while the sum is 67.

The square root of 1089888889 is about 33013.4652679782. The cubic root of 1089888889 is about 1029.1074962552.

The spelling of 1089888889 in words is "one billion, eighty-nine million, eight hundred eighty-eight thousand, eight hundred eighty-nine".