1118778589 has 2 divisors, whose sum is σ = 1118778590. Its totient is φ = 1118778588.

The previous prime is 1118778587. The next prime is 1118778599. The reversal of 1118778589 is 9858778111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 971568900 + 147209689 = 31170^2 + 12133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118778589 - 2¹ = 1118778587 is a prime.

It is a super-3 number, since 3×1118778589³ (a number of 28 digits) contains 333 as substring.

Together with 1118778587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118778587) 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 as a sum of consecutive naturals, namely, 559389294 + 559389295.

It is an arithmetic number, because the mean of its divisors is an integer number (559389295).

Almost surely, 2^1118778589 is an apocalyptic number.

It is an amenable number.

1118778589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118778589 is an equidigital number, since it uses as much as digits as its factorization.

1118778589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 55.

The square root of 1118778589 is about 33448.1477663562. The cubic root of 1118778589 is about 1038.1211729722.

The spelling of 1118778589 in words is "one billion, one hundred eighteen million, seven hundred seventy-eight thousand, five hundred eighty-nine".