8138717 has 2 divisors, whose sum is σ = 8138718. Its totient is φ = 8138716.

The previous prime is 8138693. The next prime is 8138729. The reversal of 8138717 is 7178318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7027801 + 1110916 = 2651^2 + 1054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8138717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8138737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069358 + 4069359.

It is an arithmetic number, because the mean of its divisors is an integer number (4069359).

Almost surely, 2^8138717 is an apocalyptic number.

It is an amenable number.

8138717 is a deficient number, since it is larger than the sum of its proper divisors (1).

8138717 is an equidigital number, since it uses as much as digits as its factorization.

8138717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 35.

The square root of 8138717 is about 2852.8436690432. The cubic root of 8138717 is about 201.1493572370.

The spelling of 8138717 in words is "eight million, one hundred thirty-eight thousand, seven hundred seventeen".