6781489 has 16 divisors (see below), whose sum is σ = 8144640. Its totient is φ = 5564160.

The previous prime is 6781457. The next prime is 6781493. The reversal of 6781489 is 9841876.

It is a cyclic number.

It is not a de Polignac number, because 6781489 - 2⁵ = 6781457 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 (6781409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6217 + ... + 7225.

It is an arithmetic number, because the mean of its divisors is an integer number (509040).

Almost surely, 2^6781489 is an apocalyptic number.

It is an amenable number.

6781489 is a deficient number, since it is larger than the sum of its proper divisors (1363151).

6781489 is a wasteful number, since it uses less digits than its factorization.

6781489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080.

The product of its digits is 96768, while the sum is 43.

The square root of 6781489 is about 2604.1292210641. The cubic root of 6781489 is about 189.2815805977.

The spelling of 6781489 in words is "six million, seven hundred eighty-one thousand, four hundred eighty-nine".