6481989 has 6 divisors (see below), whose sum is σ = 9362886. Its totient is φ = 4321320.

The previous prime is 6481963. The next prime is 6481991. The reversal of 6481989 is 9891846.

6481989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 5919489 + 562500 = 2433^2 + 750^2 .

It is not a de Polignac number, because 6481989 - 2⁵ = 6481957 is a prime.

It is a super-2 number, since 2×6481989² = 84032362792242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6481939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 360102 + ... + 360119.

It is an arithmetic number, because the mean of its divisors is an integer number (1560481).

Almost surely, 2^6481989 is an apocalyptic number.

It is an amenable number.

6481989 is a deficient number, since it is larger than the sum of its proper divisors (2880897).

6481989 is a wasteful number, since it uses less digits than its factorization.

6481989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720227 (or 720224 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 6481989 is about 2545.9750587938. The cubic root of 6481989 is about 186.4530233610.

The spelling of 6481989 in words is "six million, four hundred eighty-one thousand, nine hundred eighty-nine".