1171110989 has 2 divisors, whose sum is σ = 1171110990. Its totient is φ = 1171110988.

The previous prime is 1171110953. The next prime is 1171111009. The reversal of 1171110989 is 9890111711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1124462089 + 46648900 = 33533^2 + 6830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171110989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171100989) 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, 585555494 + 585555495.

It is an arithmetic number, because the mean of its divisors is an integer number (585555495).

Almost surely, 2^1171110989 is an apocalyptic number.

It is an amenable number.

1171110989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171110989 is an equidigital number, since it uses as much as digits as its factorization.

1171110989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 38.

The square root of 1171110989 is about 34221.4989297664. The cubic root of 1171110989 is about 1054.0616647212.

The spelling of 1171110989 in words is "one billion, one hundred seventy-one million, one hundred ten thousand, nine hundred eighty-nine".