8396581 has 2 divisors, whose sum is σ = 8396582. Its totient is φ = 8396580.

The previous prime is 8396569. The next prime is 8396599. The reversal of 8396581 is 1856938.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8208225 + 188356 = 2865^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 8396581 - 2²¹ = 6299429 is a prime.

It is a super-2 number, since 2×8396581² = 141005144979122, which contains 22 as substring.

8396581 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8396281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198290 + 4198291.

It is an arithmetic number, because the mean of its divisors is an integer number (4198291).

Almost surely, 2^8396581 is an apocalyptic number.

It is an amenable number.

8396581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8396581 is an equidigital number, since it uses as much as digits as its factorization.

8396581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 8396581 is about 2897.6854556697. The cubic root of 8396581 is about 203.2516877858.

The spelling of 8396581 in words is "eight million, three hundred ninety-six thousand, five hundred eighty-one".