1171328881 has 2 divisors, whose sum is σ = 1171328882. Its totient is φ = 1171328880.

The previous prime is 1171328867. The next prime is 1171328887. The reversal of 1171328881 is 1888231711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586414656 + 584914225 = 24216^2 + 24185^2 .

It is an emirp because it is prime and its reverse (1888231711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171328881 is a prime.

It is a super-2 number, since 2×1171328881² = 2744022694929424322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1171328887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585664440 + 585664441.

It is an arithmetic number, because the mean of its divisors is an integer number (585664441).

Almost surely, 2^1171328881 is an apocalyptic number.

It is an amenable number.

1171328881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171328881 is an equidigital number, since it uses as much as digits as its factorization.

1171328881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 40.

The square root of 1171328881 is about 34224.6823359984. The cubic root of 1171328881 is about 1054.1270320985.

The spelling of 1171328881 in words is "one billion, one hundred seventy-one million, three hundred twenty-eight thousand, eight hundred eighty-one".