6489997 has 6 divisors (see below), whose sum is σ = 6722378. Its totient is φ = 6265392.

The previous prime is 6489991. The next prime is 6490007. The reversal of 6489997 is 7999846.

It can be written as a sum of positive squares in 3 ways, for example, as 1042441 + 5447556 = 1021^2 + 2334^2 .

It is not a de Polignac number, because 6489997 - 2¹⁹ = 5965709 is a prime.

It is a super-2 number, since 2×6489997² = 84240122120018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6489991) 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 5 ways as a sum of consecutive naturals, for example, 3018 + ... + 4699.

Almost surely, 2^6489997 is an apocalyptic number.

It is an amenable number.

6489997 is a deficient number, since it is larger than the sum of its proper divisors (232381).

6489997 is an equidigital number, since it uses as much as digits as its factorization.

6489997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7775 (or 7746 counting only the distinct ones).

The product of its digits is 979776, while the sum is 52.

The square root of 6489997 is about 2547.5472517698. The cubic root of 6489997 is about 186.5297745638.

The spelling of 6489997 in words is "six million, four hundred eighty-nine thousand, nine hundred ninety-seven".