8491697 has 2 divisors, whose sum is σ = 8491698. Its totient is φ = 8491696.

The previous prime is 8491673. The next prime is 8491711. The reversal of 8491697 is 7961948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5193841 + 3297856 = 2279^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 8491697 - 2¹⁰ = 8490673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8491667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245848 + 4245849.

It is an arithmetic number, because the mean of its divisors is an integer number (4245849).

Almost surely, 2^8491697 is an apocalyptic number.

It is an amenable number.

8491697 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491697 is an equidigital number, since it uses as much as digits as its factorization.

8491697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 8491697 is about 2914.0516467626. The cubic root of 8491697 is about 204.0162825015.

It can be divided in two parts, 849 and 1697, that multiplied together give a triangular number (1440753 = T₁₆₉₇).

The spelling of 8491697 in words is "eight million, four hundred ninety-one thousand, six hundred ninety-seven".