6427009 has 4 divisors (see below), whose sum is σ = 6648660. Its totient is φ = 6205360.

The previous prime is 6427007. The next prime is 6427039. The reversal of 6427009 is 9007246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3441025 + 2985984 = 1855^2 + 1728^2 .

It is a cyclic number.

It is not a de Polignac number, because 6427009 - 2¹ = 6427007 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6427007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110782 + ... + 110839.

It is an arithmetic number, because the mean of its divisors is an integer number (1662165).

Almost surely, 2^6427009 is an apocalyptic number.

It is an amenable number.

6427009 is a deficient number, since it is larger than the sum of its proper divisors (221651).

6427009 is a wasteful number, since it uses less digits than its factorization.

6427009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221650.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 6427009 is about 2535.1546303924. The cubic root of 6427009 is about 185.9243632034.

The spelling of 6427009 in words is "six million, four hundred twenty-seven thousand, nine".