8717689 has 2 divisors, whose sum is σ = 8717690. Its totient is φ = 8717688.

The previous prime is 8717677. The next prime is 8717717. The reversal of 8717689 is 9867178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8363664 + 354025 = 2892^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 8717689 - 2²³ = 329081 is a prime.

It is not a weakly prime, because it can be changed into another prime (8717389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4358844 + 4358845.

It is an arithmetic number, because the mean of its divisors is an integer number (4358845).

Almost surely, 2^8717689 is an apocalyptic number.

It is an amenable number.

8717689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8717689 is an equidigital number, since it uses as much as digits as its factorization.

8717689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 8717689 is about 2952.5732844419. The cubic root of 8717689 is about 205.8103086172.

The spelling of 8717689 in words is "eight million, seven hundred seventeen thousand, six hundred eighty-nine".