8689561 has 8 divisors (see below), whose sum is σ = 9313344. Its totient is φ = 8086320.

The previous prime is 8689553. The next prime is 8689573. The reversal of 8689561 is 1659868.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8689561 - 2³ = 8689553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8689591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4255 + ... + 5956.

It is an arithmetic number, because the mean of its divisors is an integer number (1164168).

Almost surely, 2^8689561 is an apocalyptic number.

It is an amenable number.

8689561 is a deficient number, since it is larger than the sum of its proper divisors (623783).

8689561 is a wasteful number, since it uses less digits than its factorization.

8689561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271.

The product of its digits is 103680, while the sum is 43.

The square root of 8689561 is about 2947.8061333812. The cubic root of 8689561 is about 205.5887181731.

The spelling of 8689561 in words is "eight million, six hundred eighty-nine thousand, five hundred sixty-one".