8605609 has 2 divisors, whose sum is σ = 8605610. Its totient is φ = 8605608.

The previous prime is 8605607. The next prime is 8605637. The reversal of 8605609 is 9065068.

8605609 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7290000 + 1315609 = 2700^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 8605609 - 2¹ = 8605607 is a prime.

Together with 8605607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8605601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4302804 + 4302805.

It is an arithmetic number, because the mean of its divisors is an integer number (4302805).

Almost surely, 2^8605609 is an apocalyptic number.

It is an amenable number.

8605609 is a deficient number, since it is larger than the sum of its proper divisors (1).

8605609 is an equidigital number, since it uses as much as digits as its factorization.

8605609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 8605609 is about 2933.5318304051. The cubic root of 8605609 is about 204.9244933108.

The spelling of 8605609 in words is "eight million, six hundred five thousand, six hundred nine".