8197817 has 2 divisors, whose sum is σ = 8197818. Its totient is φ = 8197816.

The previous prime is 8197801. The next prime is 8197823. The reversal of 8197817 is 7187918.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6497401 + 1700416 = 2549^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 8197817 - 2⁴ = 8197801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8197837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4098908 + 4098909.

It is an arithmetic number, because the mean of its divisors is an integer number (4098909).

Almost surely, 2^8197817 is an apocalyptic number.

It is an amenable number.

8197817 is a deficient number, since it is larger than the sum of its proper divisors (1).

8197817 is an equidigital number, since it uses as much as digits as its factorization.

8197817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 41.

The square root of 8197817 is about 2863.1830189494. The cubic root of 8197817 is about 201.6350712821.

The spelling of 8197817 in words is "eight million, one hundred ninety-seven thousand, eight hundred seventeen".