8168645 has 4 divisors (see below), whose sum is σ = 9802380. Its totient is φ = 6534912.

The previous prime is 8168623. The next prime is 8168669. The reversal of 8168645 is 5468618.

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 948676 + 7219969 = 974^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 8168645 - 2¹² = 8164549 is a prime.

It is a super-2 number, since 2×8168645² = 133453522272050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8168599 and 8168608.

It is a congruent number.

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, 816860 + ... + 816869.

It is an arithmetic number, because the mean of its divisors is an integer number (2450595).

Almost surely, 2^8168645 is an apocalyptic number.

It is an amenable number.

8168645 is a deficient number, since it is larger than the sum of its proper divisors (1633735).

8168645 is a wasteful number, since it uses less digits than its factorization.

8168645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633734.

The product of its digits is 46080, while the sum is 38.

The square root of 8168645 is about 2858.0841485163. The cubic root of 8168645 is about 201.3956136601.

The spelling of 8168645 in words is "eight million, one hundred sixty-eight thousand, six hundred forty-five".