6547989 has 16 divisors (see below), whose sum is σ = 10503680. Its totient is φ = 3544560.

The previous prime is 6547979. The next prime is 6548023. The reversal of 6547989 is 9897456.

It is not a de Polignac number, because 6547989 - 2⁴ = 6547973 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 (6547909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7807 + ... + 8604.

It is an arithmetic number, because the mean of its divisors is an integer number (656480).

Almost surely, 2^6547989 is an apocalyptic number.

It is an amenable number.

6547989 is a deficient number, since it is larger than the sum of its proper divisors (3955691).

6547989 is a wasteful number, since it uses less digits than its factorization.

6547989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440.

The product of its digits is 544320, while the sum is 48.

The square root of 6547989 is about 2558.9038668930. The cubic root of 6547989 is about 187.0837128887.

The spelling of 6547989 in words is "six million, five hundred forty-seven thousand, nine hundred eighty-nine".