8497661 has 2 divisors, whose sum is σ = 8497662. Its totient is φ = 8497660.

The previous prime is 8497651. The next prime is 8497681. The reversal of 8497661 is 1667948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5712100 + 2785561 = 2390^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 8497661 - 2¹⁸ = 8235517 is a prime.

It is a Chen prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248830 + 4248831.

It is an arithmetic number, because the mean of its divisors is an integer number (4248831).

Almost surely, 2^8497661 is an apocalyptic number.

It is an amenable number.

8497661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8497661 is an equidigital number, since it uses as much as digits as its factorization.

8497661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 8497661 is about 2915.0747846325. The cubic root of 8497661 is about 204.0640337878.

The spelling of 8497661 in words is "eight million, four hundred ninety-seven thousand, six hundred sixty-one".