168717145 has 4 divisors (see below), whose sum is σ = 202460580. Its totient is φ = 134973712.

The previous prime is 168717137. The next prime is 168717181. The reversal of 168717145 is 541717861.

168717145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19193161 + 149523984 = 4381^2 + 12228^2 .

It is a cyclic number.

It is not a de Polignac number, because 168717145 - 2³ = 168717137 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 168717098 and 168717107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16871710 + ... + 16871719.

It is an arithmetic number, because the mean of its divisors is an integer number (50615145).

Almost surely, 2^168717145 is an apocalyptic number.

It is an amenable number.

168717145 is a deficient number, since it is larger than the sum of its proper divisors (33743435).

168717145 is an equidigital number, since it uses as much as digits as its factorization.

168717145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33743434.

The product of its digits is 47040, while the sum is 40.

The square root of 168717145 is about 12989.1164056682. The cubic root of 168717145 is about 552.5688591039.

The spelling of 168717145 in words is "one hundred sixty-eight million, seven hundred seventeen thousand, one hundred forty-five".