8181346 has 4 divisors (see below), whose sum is σ = 12272022. Its totient is φ = 4090672.

The previous prime is 8181317. The next prime is 8181347. The reversal of 8181346 is 6431818.

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

It can be written as a sum of positive squares in only one way, i.e., 7230721 + 950625 = 2689^2 + 975^2 .

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 not an unprimeable number, because it can be changed into a prime (8181347) 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 as a sum of consecutive naturals, namely, 2045335 + ... + 2045338.

Almost surely, 2^8181346 is an apocalyptic number.

8181346 is a deficient number, since it is larger than the sum of its proper divisors (4090676).

8181346 is a wasteful number, since it uses less digits than its factorization.

8181346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090675.

The product of its digits is 4608, while the sum is 31.

The square root of 8181346 is about 2860.3052284678. The cubic root of 8181346 is about 201.4999394533.

The spelling of 8181346 in words is "eight million, one hundred eighty-one thousand, three hundred forty-six".