9678517 has 2 divisors, whose sum is σ = 9678518. Its totient is φ = 9678516.

The previous prime is 9678511. The next prime is 9678521. The reversal of 9678517 is 7158769.

9678517 is digitally balanced in base 3, 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., 9678321 + 196 = 3111^2 + 14^2 .

It is a cyclic number.

It is not a de Polignac number, because 9678517 - 2³ = 9678509 is a prime.

9678517 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9678511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4839258 + 4839259.

It is an arithmetic number, because the mean of its divisors is an integer number (4839259).

Almost surely, 2^9678517 is an apocalyptic number.

It is an amenable number.

9678517 is a deficient number, since it is larger than the sum of its proper divisors (1).

9678517 is an equidigital number, since it uses as much as digits as its factorization.

9678517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The square root of 9678517 is about 3111.0315009656. The cubic root of 9678517 is about 213.1095632705.

The spelling of 9678517 in words is "nine million, six hundred seventy-eight thousand, five hundred seventeen".