8168605 has 8 divisors (see below), whose sum is σ = 9853272. Its totient is φ = 6500928.

The previous prime is 8168603. The next prime is 8168617. The reversal of 8168605 is 5068618.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1833316 + 6335289 = 1354^2 + 2517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8168605 - 2¹ = 8168603 is a prime.

It is a super-2 number, since 2×8168605² = 133452215292050, which contains 22 as substring.

It is a Duffinian number.

8168605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8168603) 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 in 7 ways as a sum of consecutive naturals, for example, 3162 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (1231659).

Almost surely, 2^8168605 is an apocalyptic number.

It is an amenable number.

8168605 is a deficient number, since it is larger than the sum of its proper divisors (1684667).

8168605 is a wasteful number, since it uses less digits than its factorization.

8168605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8495.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 8168605 is about 2858.0771508131. The cubic root of 8168605 is about 201.3952849301.

It can be divided in two parts, 81 and 68605, that added together give a palindrome (68686).

The spelling of 8168605 in words is "eight million, one hundred sixty-eight thousand, six hundred five".