8959989 has 4 divisors (see below), whose sum is σ = 11946656. Its totient is φ = 5973324.

The previous prime is 8959981. The next prime is 8959991. The reversal of 8959989 is 9899598.

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.

It is not a de Polignac number, because 8959989 - 2³ = 8959981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8959981) 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, 1493329 + ... + 1493334.

It is an arithmetic number, because the mean of its divisors is an integer number (2986664).

Almost surely, 2^8959989 is an apocalyptic number.

It is an amenable number.

8959989 is a deficient number, since it is larger than the sum of its proper divisors (2986667).

8959989 is a wasteful number, since it uses less digits than its factorization.

8959989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986666.

The product of its digits is 2099520, while the sum is 57.

The square root of 8959989 is about 2993.3240719976. The cubic root of 8959989 is about 207.6996790778.

The spelling of 8959989 in words is "eight million, nine hundred fifty-nine thousand, nine hundred eighty-nine".