8491297 has 2 divisors, whose sum is σ = 8491298. Its totient is φ = 8491296.

The previous prime is 8491277. The next prime is 8491319. The reversal of 8491297 is 7921948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8433216 + 58081 = 2904^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 8491297 - 2⁷ = 8491169 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8491207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245648 + 4245649.

It is an arithmetic number, because the mean of its divisors is an integer number (4245649).

Almost surely, 2^8491297 is an apocalyptic number.

It is an amenable number.

8491297 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491297 is an equidigital number, since it uses as much as digits as its factorization.

8491297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 8491297 is about 2913.9830129910. The cubic root of 8491297 is about 204.0130790666.

The spelling of 8491297 in words is "eight million, four hundred ninety-one thousand, two hundred ninety-seven".