8618689 has 2 divisors, whose sum is σ = 8618690. Its totient is φ = 8618688.

The previous prime is 8618683. The next prime is 8618699. The reversal of 8618689 is 9868168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8363664 + 255025 = 2892^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 8618689 - 2³ = 8618681 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (8618681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4309344 + 4309345.

It is an arithmetic number, because the mean of its divisors is an integer number (4309345).

Almost surely, 2^8618689 is an apocalyptic number.

It is an amenable number.

8618689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8618689 is an equidigital number, since it uses as much as digits as its factorization.

8618689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 46.

The square root of 8618689 is about 2935.7603785050. The cubic root of 8618689 is about 205.0282649903.

The spelling of 8618689 in words is "eight million, six hundred eighteen thousand, six hundred eighty-nine".