1116867181 has 2 divisors, whose sum is σ = 1116867182. Its totient is φ = 1116867180.

The previous prime is 1116867149. The next prime is 1116867187. The reversal of 1116867181 is 1817686111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1042321225 + 74545956 = 32285^2 + 8634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116867181 - 2⁵ = 1116867149 is a prime.

It is a super-2 number, since 2×1116867181² = 2494784599989773522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116867187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558433590 + 558433591.

It is an arithmetic number, because the mean of its divisors is an integer number (558433591).

Almost surely, 2^1116867181 is an apocalyptic number.

It is an amenable number.

1116867181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116867181 is an equidigital number, since it uses as much as digits as its factorization.

1116867181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 40.

The square root of 1116867181 is about 33419.5628487268. The cubic root of 1116867181 is about 1037.5296337595.

The spelling of 1116867181 in words is "one billion, one hundred sixteen million, eight hundred sixty-seven thousand, one hundred eighty-one".