8113738181 has 2 divisors, whose sum is σ = 8113738182. Its totient is φ = 8113738180.

The previous prime is 8113738079. The next prime is 8113738211. The reversal of 8113738181 is 1818373118.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7781004100 + 332734081 = 88210^2 + 18241^2 .

It is a cyclic number.

It is not a de Polignac number, because 8113738181 - 2²² = 8109543877 is a prime.

It is a super-2 number, since 2×8113738181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8113738981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4056869090 + 4056869091.

It is an arithmetic number, because the mean of its divisors is an integer number (4056869091).

Almost surely, 2^8113738181 is an apocalyptic number.

It is an amenable number.

8113738181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8113738181 is an equidigital number, since it uses as much as digits as its factorization.

8113738181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 41.

The square root of 8113738181 is about 90076.2908927760. The cubic root of 8113738181 is about 2009.4336152412.

The spelling of 8113738181 in words is "eight billion, one hundred thirteen million, seven hundred thirty-eight thousand, one hundred eighty-one".