8181011 has 2 divisors, whose sum is σ = 8181012. Its totient is φ = 8181010.

The previous prime is 8181007. The next prime is 8181023. The reversal of 8181011 is 1101818.

8181011 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8181011 - 2² = 8181007 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8181071) 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, 4090505 + 4090506.

It is an arithmetic number, because the mean of its divisors is an integer number (4090506).

Almost surely, 2^8181011 is an apocalyptic number.

8181011 is a deficient number, since it is larger than the sum of its proper divisors (1).

8181011 is an equidigital number, since it uses as much as digits as its factorization.

8181011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 8181011 is about 2860.2466676844. The cubic root of 8181011 is about 201.4971891560.

Adding to 8181011 its reverse (1101818), we get a palindrome (9282829).

The spelling of 8181011 in words is "eight million, one hundred eighty-one thousand, eleven".