8989561 has 4 divisors (see below), whose sum is σ = 10273792. Its totient is φ = 7705332.

The previous prime is 8989553. The next prime is 8989567. The reversal of 8989561 is 1659898.

8989561 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 semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1659898 = 2 ⋅829949.

It is a cyclic number.

It is not a de Polignac number, because 8989561 - 2³ = 8989553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8989567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642105 + ... + 642118.

It is an arithmetic number, because the mean of its divisors is an integer number (2568448).

Almost surely, 2^8989561 is an apocalyptic number.

It is an amenable number.

8989561 is a deficient number, since it is larger than the sum of its proper divisors (1284231).

8989561 is a wasteful number, since it uses less digits than its factorization.

8989561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284230.

The product of its digits is 155520, while the sum is 46.

The square root of 8989561 is about 2998.2596618705. The cubic root of 8989561 is about 207.9279289877.

The spelling of 8989561 in words is "eight million, nine hundred eighty-nine thousand, five hundred sixty-one".