1116861181 has 2 divisors, whose sum is σ = 1116861182. Its totient is φ = 1116861180.

The previous prime is 1116861113. The next prime is 1116861199. The reversal of 1116861181 is 1811686111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058200900 + 58660281 = 32530^2 + 7659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116861181 - 2²⁹ = 579990269 is a prime.

It is a super-2 number, since 2×1116861181² = 2494757795249429522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116867181) 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, 558430590 + 558430591.

It is an arithmetic number, because the mean of its divisors is an integer number (558430591).

Almost surely, 2^1116861181 is an apocalyptic number.

It is an amenable number.

1116861181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116861181 is an equidigital number, since it uses as much as digits as its factorization.

1116861181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 34.

The square root of 1116861181 is about 33419.4730808252. The cubic root of 1116861181 is about 1037.5277758277.

The spelling of 1116861181 in words is "one billion, one hundred sixteen million, eight hundred sixty-one thousand, one hundred eighty-one".