6418989 has 12 divisors (see below), whose sum is σ = 9447516. Its totient is φ = 4198272.

The previous prime is 6418981. The next prime is 6418991. The reversal of 6418989 is 9898146.

6418989 is digitally balanced in base 4, 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 2 ways, for example, as 5904900 + 514089 = 2430^2 + 717^2 .

It is not a de Polignac number, because 6418989 - 2³ = 6418981 is a prime.

6418989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418981) 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, 6252 + ... + 7205.

It is an arithmetic number, because the mean of its divisors is an integer number (787293).

Almost surely, 2^6418989 is an apocalyptic number.

It is an amenable number.

6418989 is a deficient number, since it is larger than the sum of its proper divisors (3028527).

6418989 is a wasteful number, since it uses less digits than its factorization.

6418989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13516 (or 13513 counting only the distinct ones).

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

The square root of 6418989 is about 2533.5723790727. The cubic root of 6418989 is about 185.8469952263.

The spelling of 6418989 in words is "six million, four hundred eighteen thousand, nine hundred eighty-nine".