168891713 has 2 divisors, whose sum is σ = 168891714. Its totient is φ = 168891712.

The previous prime is 168891683. The next prime is 168891731. The reversal of 168891713 is 317198861.

Together with next prime (168891731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147064129 + 21827584 = 12127^2 + 4672^2 .

It is a cyclic number.

It is not a de Polignac number, because 168891713 - 2²⁴ = 152114497 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (168891743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84445856 + 84445857.

It is an arithmetic number, because the mean of its divisors is an integer number (84445857).

Almost surely, 2^168891713 is an apocalyptic number.

It is an amenable number.

168891713 is a deficient number, since it is larger than the sum of its proper divisors (1).

168891713 is an equidigital number, since it uses as much as digits as its factorization.

168891713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 168891713 is about 12995.8344480068. The cubic root of 168891713 is about 552.7593704497.

The spelling of 168891713 in words is "one hundred sixty-eight million, eight hundred ninety-one thousand, seven hundred thirteen".