8120317 has 2 divisors, whose sum is σ = 8120318. Its totient is φ = 8120316.

The previous prime is 8120269. The next prime is 8120363. The reversal of 8120317 is 7130218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4756761 + 3363556 = 2181^2 + 1834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120317 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8120117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060158 + 4060159.

It is an arithmetic number, because the mean of its divisors is an integer number (4060159).

Almost surely, 2^8120317 is an apocalyptic number.

It is an amenable number.

8120317 is a deficient number, since it is larger than the sum of its proper divisors (1).

8120317 is an equidigital number, since it uses as much as digits as its factorization.

8120317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 8120317 is about 2849.6169918078. The cubic root of 8120317 is about 200.9976567964.

Subtracting from 8120317 its reverse (7130218), we obtain a palindrome (990099).

The spelling of 8120317 in words is "eight million, one hundred twenty thousand, three hundred seventeen".