6549985 has 8 divisors (see below), whose sum is σ = 8464680. Its totient is φ = 4836864.

The previous prime is 6549979. The next prime is 6550001. The reversal of 6549985 is 5899456.

It can be written as a sum of positive squares in 4 ways, for example, as 364816 + 6185169 = 604^2 + 2487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6549985 - 2⁷ = 6549857 is a prime.

It is a super-3 number, since 3×6549985³ (a number of 21 digits) contains 333 as substring.

6549985 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50320 + ... + 50449.

It is an arithmetic number, because the mean of its divisors is an integer number (1058085).

Almost surely, 2^6549985 is an apocalyptic number.

6549985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6549985 is a deficient number, since it is larger than the sum of its proper divisors (1914695).

6549985 is a wasteful number, since it uses less digits than its factorization.

6549985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100787.

The product of its digits is 388800, while the sum is 46.

The square root of 6549985 is about 2559.2938479198. The cubic root of 6549985 is about 187.1027203099.

The spelling of 6549985 in words is "six million, five hundred forty-nine thousand, nine hundred eighty-five".