8685917 has 2 divisors, whose sum is σ = 8685918. Its totient is φ = 8685916.

The previous prime is 8685913. The next prime is 8685923. The reversal of 8685917 is 7195868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8444836 + 241081 = 2906^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 8685917 - 2² = 8685913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8685913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4342958 + 4342959.

It is an arithmetic number, because the mean of its divisors is an integer number (4342959).

Almost surely, 2^8685917 is an apocalyptic number.

It is an amenable number.

8685917 is a deficient number, since it is larger than the sum of its proper divisors (1).

8685917 is an equidigital number, since it uses as much as digits as its factorization.

8685917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 8685917 is about 2947.1879817887. The cubic root of 8685917 is about 205.5599760216.

The spelling of 8685917 in words is "eight million, six hundred eighty-five thousand, nine hundred seventeen".