168517145 has 4 divisors (see below), whose sum is σ = 202220580. Its totient is φ = 134813712.

The previous prime is 168517123. The next prime is 168517163. The reversal of 168517145 is 541715861.

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 21307456 + 147209689 = 4616^2 + 12133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168517145 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168517099 and 168517108.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 16851710 + ... + 16851719.

It is an arithmetic number, because the mean of its divisors is an integer number (50555145).

Almost surely, 2^168517145 is an apocalyptic number.

It is an amenable number.

168517145 is a deficient number, since it is larger than the sum of its proper divisors (33703435).

168517145 is an equidigital number, since it uses as much as digits as its factorization.

168517145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33703434.

The product of its digits is 33600, while the sum is 38.

The square root of 168517145 is about 12981.4153696737. The cubic root of 168517145 is about 552.3504314532.

The spelling of 168517145 in words is "one hundred sixty-eight million, five hundred seventeen thousand, one hundred forty-five".