816968171 has 2 divisors, whose sum is σ = 816968172. Its totient is φ = 816968170.

The previous prime is 816968123. The next prime is 816968227. The reversal of 816968171 is 171869618.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-816968171 is a prime.

It is not a weakly prime, because it can be changed into another prime (816968101) 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, 408484085 + 408484086.

It is an arithmetic number, because the mean of its divisors is an integer number (408484086).

Almost surely, 2^816968171 is an apocalyptic number.

816968171 is a deficient number, since it is larger than the sum of its proper divisors (1).

816968171 is an equidigital number, since it uses as much as digits as its factorization.

816968171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 47.

The square root of 816968171 is about 28582.6550726135. The cubic root of 816968171 is about 934.8351758419.

The spelling of 816968171 in words is "eight hundred sixteen million, nine hundred sixty-eight thousand, one hundred seventy-one".