8646989 has 4 divisors (see below), whose sum is σ = 9312156. Its totient is φ = 7981824.

The previous prime is 8646971. The next prime is 8647007. The reversal of 8646989 is 9896468.

8646989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8646971) and next prime (8647007).

It can be written as a sum of positive squares in 2 ways, for example, as 3204100 + 5442889 = 1790^2 + 2333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8646989 is a prime.

It is a super-2 number, since 2×8646989² = 149540837532242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8646929) 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, 332564 + ... + 332589.

It is an arithmetic number, because the mean of its divisors is an integer number (2328039).

Almost surely, 2^8646989 is an apocalyptic number.

It is an amenable number.

8646989 is a deficient number, since it is larger than the sum of its proper divisors (665167).

8646989 is a wasteful number, since it uses less digits than its factorization.

8646989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665166.

The product of its digits is 746496, while the sum is 50.

The square root of 8646989 is about 2940.5763040601. The cubic root of 8646989 is about 205.2524274942.

The spelling of 8646989 in words is "eight million, six hundred forty-six thousand, nine hundred eighty-nine".