8163818 has 8 divisors (see below), whose sum is σ = 13187748. Its totient is φ = 3767904.

The previous prime is 8163817. The next prime is 8163821. The reversal of 8163818 is 8183618.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8162449 + 1369 = 2857^2 + 37^2 .

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

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8163817) 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 3 ways as a sum of consecutive naturals, for example, 156971 + ... + 157022.

Almost surely, 2^8163818 is an apocalyptic number.

8163818 is a deficient number, since it is larger than the sum of its proper divisors (5023930).

8163818 is a wasteful number, since it uses less digits than its factorization.

8163818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314008.

The product of its digits is 9216, while the sum is 35.

The square root of 8163818 is about 2857.2395769344. The cubic root of 8163818 is about 201.3559364075.

The spelling of 8163818 in words is "eight million, one hundred sixty-three thousand, eight hundred eighteen".