6840489 has 4 divisors (see below), whose sum is σ = 9120656. Its totient is φ = 4560324.

The previous prime is 6840473. The next prime is 6840497. The reversal of 6840489 is 9840486.

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 6840489 - 2⁴ = 6840473 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6840439) 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, 1140079 + ... + 1140084.

It is an arithmetic number, because the mean of its divisors is an integer number (2280164).

Almost surely, 2^6840489 is an apocalyptic number.

It is an amenable number.

6840489 is a deficient number, since it is larger than the sum of its proper divisors (2280167).

6840489 is a wasteful number, since it uses less digits than its factorization.

6840489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280166.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 6840489 is about 2615.4328513651. The cubic root of 6840489 is about 189.8289226459.

The spelling of 6840489 in words is "six million, eight hundred forty thousand, four hundred eighty-nine".