6598989 has 20 divisors (see below), whose sum is σ = 9927324. Its totient is φ = 4368384.

The previous prime is 6598967. The next prime is 6598993. The reversal of 6598989 is 9898956.

It can be written as a sum of positive squares in 2 ways, for example, as 3674889 + 2924100 = 1917^2 + 1710^2 .

It is not a de Polignac number, because 6598989 - 2⁸ = 6598733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6598289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20659 + ... + 20975.

Almost surely, 2^6598989 is an apocalyptic number.

It is an amenable number.

6598989 is a deficient number, since it is larger than the sum of its proper divisors (3328335).

6598989 is a wasteful number, since it uses less digits than its factorization.

6598989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 577 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 6598989 is about 2568.8497425891. The cubic root of 6598989 is about 187.5681672142.

The spelling of 6598989 in words is "six million, five hundred ninety-eight thousand, nine hundred eighty-nine".