8491097 has 2 divisors, whose sum is σ = 8491098. Its totient is φ = 8491096.

The previous prime is 8491073. The next prime is 8491099. The reversal of 8491097 is 7901948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 2085136 = 2531^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 8491097 - 2⁶ = 8491033 is a prime.

Together with 8491099, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8491097.

It is not a weakly prime, because it can be changed into another prime (8491099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245548 + 4245549.

It is an arithmetic number, because the mean of its divisors is an integer number (4245549).

Almost surely, 2^8491097 is an apocalyptic number.

It is an amenable number.

8491097 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491097 is an equidigital number, since it uses as much as digits as its factorization.

8491097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 8491097 is about 2913.9486954989. The cubic root of 8491097 is about 204.0114773115.

The spelling of 8491097 in words is "eight million, four hundred ninety-one thousand, ninety-seven".