1116611491 has 2 divisors, whose sum is σ = 1116611492. Its totient is φ = 1116611490.

The previous prime is 1116611479. The next prime is 1116611519. The reversal of 1116611491 is 1941166111.

It is a weak prime.

It is an emirp because it is prime and its reverse (1941166111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1116611491 - 2¹⁷ = 1116480419 is a prime.

It is not a weakly prime, because it can be changed into another prime (1116611471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558305745 + 558305746.

It is an arithmetic number, because the mean of its divisors is an integer number (558305746).

Almost surely, 2^1116611491 is an apocalyptic number.

1116611491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116611491 is an equidigital number, since it uses as much as digits as its factorization.

1116611491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The square root of 1116611491 is about 33415.7371757679. The cubic root of 1116611491 is about 1037.4504520974.

The spelling of 1116611491 in words is "one billion, one hundred sixteen million, six hundred eleven thousand, four hundred ninety-one".