8133681 has 8 divisors (see below), whose sum is σ = 11028960. Its totient is φ = 5330432.

The previous prime is 8133641. The next prime is 8133707. The reversal of 8133681 is 1863318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8133681 - 2⁶ = 8133617 is a prime.

It is a super-2 number, since 2×8133681² = 132313533219522, which contains 22 as substring.

8133681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8133611) 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 in 7 ways as a sum of consecutive naturals, for example, 22800 + ... + 23153.

It is an arithmetic number, because the mean of its divisors is an integer number (1378620).

Almost surely, 2^8133681 is an apocalyptic number.

It is an amenable number.

8133681 is a deficient number, since it is larger than the sum of its proper divisors (2895279).

8133681 is a wasteful number, since it uses less digits than its factorization.

8133681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46015.

The product of its digits is 3456, while the sum is 30.

The square root of 8133681 is about 2851.9609043604. The cubic root of 8133681 is about 201.1078602307.

Adding to 8133681 its reverse (1863318), we get a palindrome (9996999).

The spelling of 8133681 in words is "eight million, one hundred thirty-three thousand, six hundred eighty-one".