8497681 has 2 divisors, whose sum is σ = 8497682. Its totient is φ = 8497680.

The previous prime is 8497661. The next prime is 8497717. The reversal of 8497681 is 1867948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5290000 + 3207681 = 2300^2 + 1791^2 .

It is a cyclic number.

It is not a de Polignac number, because 8497681 - 2⁹ = 8497169 is a prime.

It is a super-2 number, since 2×8497681² = 144421164755522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8497651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248840 + 4248841.

It is an arithmetic number, because the mean of its divisors is an integer number (4248841).

Almost surely, 2^8497681 is an apocalyptic number.

It is an amenable number.

8497681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8497681 is an equidigital number, since it uses as much as digits as its factorization.

8497681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 8497681 is about 2915.0782150742. The cubic root of 8497681 is about 204.0641938819.

The spelling of 8497681 in words is "eight million, four hundred ninety-seven thousand, six hundred eighty-one".