8181814 has 4 divisors (see below), whose sum is σ = 12272724. Its totient is φ = 4090906.

The previous prime is 8181809. The next prime is 8181821. The reversal of 8181814 is 4181818.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

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

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2045452 + ... + 2045455.

It is an arithmetic number, because the mean of its divisors is an integer number (3068181).

Almost surely, 2^8181814 is an apocalyptic number.

8181814 is a deficient number, since it is larger than the sum of its proper divisors (4090910).

8181814 is a wasteful number, since it uses less digits than its factorization.

8181814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090909.

The product of its digits is 2048, while the sum is 31.

The square root of 8181814 is about 2860.3870367487. The cubic root of 8181814 is about 201.5037815339.

The spelling of 8181814 in words is "eight million, one hundred eighty-one thousand, eight hundred fourteen".