1171664171 has 2 divisors, whose sum is σ = 1171664172. Its totient is φ = 1171664170.

The previous prime is 1171664167. The next prime is 1171664173. The reversal of 1171664171 is 1714661711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1171664171 - 2² = 1171664167 is a prime.

Together with 1171664173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1171664173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585832085 + 585832086.

It is an arithmetic number, because the mean of its divisors is an integer number (585832086).

Almost surely, 2^1171664171 is an apocalyptic number.

1171664171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171664171 is an equidigital number, since it uses as much as digits as its factorization.

1171664171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 35.

The square root of 1171664171 is about 34229.5803509187. The cubic root of 1171664171 is about 1054.2276029231.

The spelling of 1171664171 in words is "one billion, one hundred seventy-one million, six hundred sixty-four thousand, one hundred seventy-one".