1138196911 has 2 divisors, whose sum is σ = 1138196912. Its totient is φ = 1138196910.

The previous prime is 1138196909. The next prime is 1138196989. The reversal of 1138196911 is 1196918311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1138196911 - 2¹ = 1138196909 is a prime.

Together with 1138196909, 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 (1138196711) 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, 569098455 + 569098456.

It is an arithmetic number, because the mean of its divisors is an integer number (569098456).

Almost surely, 2^1138196911 is an apocalyptic number.

1138196911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138196911 is an equidigital number, since it uses as much as digits as its factorization.

1138196911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 40.

The square root of 1138196911 is about 33737.1740221377. The cubic root of 1138196911 is about 1044.0928800652.

The spelling of 1138196911 in words is "one billion, one hundred thirty-eight million, one hundred ninety-six thousand, nine hundred eleven".