168697917 has 16 divisors (see below), whose sum is σ = 253445760. Its totient is φ = 110880000.

The previous prime is 168697909. The next prime is 168697937. The reversal of 168697917 is 719796861.

It is not a de Polignac number, because 168697917 - 2³ = 168697909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168697937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42084 + ... + 45917.

It is an arithmetic number, because the mean of its divisors is an integer number (15840360).

Almost surely, 2^168697917 is an apocalyptic number.

It is an amenable number.

168697917 is a deficient number, since it is larger than the sum of its proper divisors (84747843).

168697917 is an equidigital number, since it uses as much as digits as its factorization.

168697917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88081 (or 88075 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 168697917 is about 12988.3762264573. The cubic root of 168697917 is about 552.5478669720.

The spelling of 168697917 in words is "one hundred sixty-eight million, six hundred ninety-seven thousand, nine hundred seventeen".