168596891 has 2 divisors, whose sum is σ = 168596892. Its totient is φ = 168596890.

The previous prime is 168596873. The next prime is 168596893. The reversal of 168596891 is 198695861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168596891 - 2²⁶ = 101488027 is a prime.

It is a Sophie Germain prime.

Together with 168596893, 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 (168596893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84298445 + 84298446.

It is an arithmetic number, because the mean of its divisors is an integer number (84298446).

Almost surely, 2^168596891 is an apocalyptic number.

168596891 is the 6941-st centered heptagonal number.

168596891 is a deficient number, since it is larger than the sum of its proper divisors (1).

168596891 is an equidigital number, since it uses as much as digits as its factorization.

168596891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The square root of 168596891 is about 12984.4865512657. The cubic root of 168596891 is about 552.4375458161.

The spelling of 168596891 in words is "one hundred sixty-eight million, five hundred ninety-six thousand, eight hundred ninety-one".