6406909 has 8 divisors (see below), whose sum is σ = 6851520. Its totient is φ = 5969856.

The previous prime is 6406879. The next prime is 6406913. The reversal of 6406909 is 9096046.

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

It is not a de Polignac number, because 6406909 - 2⁵ = 6406877 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6406919) by changing a digit.

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, 79 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (856440).

Almost surely, 2^6406909 is an apocalyptic number.

It is an amenable number.

6406909 is a deficient number, since it is larger than the sum of its proper divisors (444611).

6406909 is a wasteful number, since it uses less digits than its factorization.

6406909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6406909 is about 2531.1872708277. The cubic root of 6406909 is about 185.7303391871.

The spelling of 6406909 in words is "six million, four hundred six thousand, nine hundred nine".