1116888889 has 2 divisors, whose sum is σ = 1116888890. Its totient is φ = 1116888888.

The previous prime is 1116888869. The next prime is 1116888911. The reversal of 1116888889 is 9888886111.

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., 1115025664 + 1863225 = 33392^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116888889 - 2¹³ = 1116880697 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1116888869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558444444 + 558444445.

It is an arithmetic number, because the mean of its divisors is an integer number (558444445).

Almost surely, 2^1116888889 is an apocalyptic number.

It is an amenable number.

1116888889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116888889 is an equidigital number, since it uses as much as digits as its factorization.

1116888889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1769472, while the sum is 58.

The square root of 1116888889 is about 33419.8876269804. The cubic root of 1116888889 is about 1037.5363557009.

The spelling of 1116888889 in words is "one billion, one hundred sixteen million, eight hundred eighty-eight thousand, eight hundred eighty-nine".