168917089 has 24 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 147576000.

The previous prime is 168917081. The next prime is 168917149. The reversal of 168917089 is 980719861.

It is not a de Polignac number, because 168917089 - 2³ = 168917081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168917081) 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 23 ways as a sum of consecutive naturals, for example, 391704 + ... + 392134.

It is an arithmetic number, because the mean of its divisors is an integer number (8043840).

Almost surely, 2^168917089 is an apocalyptic number.

It is an amenable number.

168917089 is a deficient number, since it is larger than the sum of its proper divisors (24135071).

168917089 is a wasteful number, since it uses less digits than its factorization.

168917089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 168917089 is about 12996.8107241738. The cubic root of 168917089 is about 552.7870531171.

The spelling of 168917089 in words is "one hundred sixty-eight million, nine hundred seventeen thousand, eighty-nine".