168486691 has 2 divisors, whose sum is σ = 168486692. Its totient is φ = 168486690.

The previous prime is 168486673. The next prime is 168486719. The reversal of 168486691 is 196684861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168486691 - 2²¹ = 166389539 is a prime.

It is not a weakly prime, because it can be changed into another prime (168486631) 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, 84243345 + 84243346.

It is an arithmetic number, because the mean of its divisors is an integer number (84243346).

Almost surely, 2^168486691 is an apocalyptic number.

168486691 is a deficient number, since it is larger than the sum of its proper divisors (1).

168486691 is an equidigital number, since it uses as much as digits as its factorization.

168486691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 168486691 is about 12980.2423320984. The cubic root of 168486691 is about 552.3171563158.

The spelling of 168486691 in words is "one hundred sixty-eight million, four hundred eighty-six thousand, six hundred ninety-one".