8581989 has 12 divisors (see below), whose sum is σ = 12391296. Its totient is φ = 5280912.

The previous prime is 8581981. The next prime is 8582017. The reversal of 8581989 is 9891858.

8581989 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8581989 - 2³ = 8581981 is a prime.

It is a super-2 number, since 2×8581989² = 147301070392242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8581981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7957 + ... + 8970.

It is an arithmetic number, because the mean of its divisors is an integer number (1032608).

Almost surely, 2^8581989 is an apocalyptic number.

It is an amenable number.

8581989 is a deficient number, since it is larger than the sum of its proper divisors (3809307).

8581989 is a wasteful number, since it uses less digits than its factorization.

8581989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16956 (or 16943 counting only the distinct ones).

The product of its digits is 207360, while the sum is 48.

The square root of 8581989 is about 2929.5032002031. The cubic root of 8581989 is about 204.7368346284.

The spelling of 8581989 in words is "eight million, five hundred eighty-one thousand, nine hundred eighty-nine".