1171664717 has 2 divisors, whose sum is σ = 1171664718. Its totient is φ = 1171664716.

The previous prime is 1171664707. The next prime is 1171664723. The reversal of 1171664717 is 7174661711.

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., 965282761 + 206381956 = 31069^2 + 14366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171664717 - 2¹⁴ = 1171648333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171664707) 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, 585832358 + 585832359.

It is an arithmetic number, because the mean of its divisors is an integer number (585832359).

Almost surely, 2^1171664717 is an apocalyptic number.

It is an amenable number.

1171664717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171664717 is an equidigital number, since it uses as much as digits as its factorization.

1171664717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 41.

The square root of 1171664717 is about 34229.5883264757. The cubic root of 1171664717 is about 1054.2277666811.

The spelling of 1171664717 in words is "one billion, one hundred seventy-one million, six hundred sixty-four thousand, seven hundred seventeen".