1191982163 has 2 divisors, whose sum is σ = 1191982164. Its totient is φ = 1191982162.

The previous prime is 1191982139. The next prime is 1191982177. The reversal of 1191982163 is 3612891911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191982163 - 2²⁰ = 1190933587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1191982163.

It is not a weakly prime, because it can be changed into another prime (1191982123) 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, 595991081 + 595991082.

It is an arithmetic number, because the mean of its divisors is an integer number (595991082).

Almost surely, 2^1191982163 is an apocalyptic number.

1191982163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191982163 is an equidigital number, since it uses as much as digits as its factorization.

1191982163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 41.

The square root of 1191982163 is about 34525.0946848810. The cubic root of 1191982163 is about 1060.2865497402.

The spelling of 1191982163 in words is "one billion, one hundred ninety-one million, nine hundred eighty-two thousand, one hundred sixty-three".