1159811197 has 2 divisors, whose sum is σ = 1159811198. Its totient is φ = 1159811196.

The previous prime is 1159811113. The next prime is 1159811201. The reversal of 1159811197 is 7911189511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816302041 + 343509156 = 28571^2 + 18534^2 .

It is an emirp because it is prime and its reverse (7911189511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1159811197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1150811197) 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, 579905598 + 579905599.

It is an arithmetic number, because the mean of its divisors is an integer number (579905599).

Almost surely, 2^1159811197 is an apocalyptic number.

It is an amenable number.

1159811197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159811197 is an equidigital number, since it uses as much as digits as its factorization.

1159811197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 43.

The square root of 1159811197 is about 34056.0008955837. Note that the first 3 decimals coincide. The cubic root of 1159811197 is about 1050.6605660520.

The spelling of 1159811197 in words is "one billion, one hundred fifty-nine million, eight hundred eleven thousand, one hundred ninety-seven".