8136881 has 2 divisors, whose sum is σ = 8136882. Its totient is φ = 8136880.

The previous prime is 8136859. The next prime is 8136889. The reversal of 8136881 is 1886318.

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., 7929856 + 207025 = 2816^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 8136881 - 2²² = 3942577 is a prime.

It is a super-2 number, since 2×8136881² = 132417664816322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8136889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068440 + 4068441.

It is an arithmetic number, because the mean of its divisors is an integer number (4068441).

Almost surely, 2^8136881 is an apocalyptic number.

It is an amenable number.

8136881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8136881 is an equidigital number, since it uses as much as digits as its factorization.

8136881 is an odious number, because the sum of its binary digits is odd.

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

The square root of 8136881 is about 2852.5218666997. The cubic root of 8136881 is about 201.1342304468.

The spelling of 8136881 in words is "eight million, one hundred thirty-six thousand, eight hundred eighty-one".