8478317 has 2 divisors, whose sum is σ = 8478318. Its totient is φ = 8478316.

The previous prime is 8478287. The next prime is 8478319. The reversal of 8478317 is 7138748.

8478317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4553956 + 3924361 = 2134^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 8478317 - 2⁸ = 8478061 is a prime.

Together with 8478319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8478319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239158 + 4239159.

It is an arithmetic number, because the mean of its divisors is an integer number (4239159).

Almost surely, 2^8478317 is an apocalyptic number.

It is an amenable number.

8478317 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478317 is an equidigital number, since it uses as much as digits as its factorization.

8478317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 8478317 is about 2911.7549690865. The cubic root of 8478317 is about 203.9090729599.

The spelling of 8478317 in words is "eight million, four hundred seventy-eight thousand, three hundred seventeen".