8717947013 has 2 divisors, whose sum is σ = 8717947014. Its totient is φ = 8717947012.

The previous prime is 8717947009. The next prime is 8717947093. The reversal of 8717947013 is 3107497178.

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., 5864036929 + 2853910084 = 76577^2 + 53422^2 .

It is a cyclic number.

It is not a de Polignac number, because 8717947013 - 2² = 8717947009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8717947093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4358973506 + 4358973507.

It is an arithmetic number, because the mean of its divisors is an integer number (4358973507).

Almost surely, 2^8717947013 is an apocalyptic number.

It is an amenable number.

8717947013 is a deficient number, since it is larger than the sum of its proper divisors (1).

8717947013 is an equidigital number, since it uses as much as digits as its factorization.

8717947013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 8717947013 is about 93369.9470547135. The cubic root of 8717947013 is about 2058.1233901815.

The spelling of 8717947013 in words is "eight billion, seven hundred seventeen million, nine hundred forty-seven thousand, thirteen".