6409859 has 4 divisors (see below), whose sum is σ = 6747240. Its totient is φ = 6072480.

The previous prime is 6409849. The next prime is 6409883. The reversal of 6409859 is 9589046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9589046 = 2 ⋅4794523.

It is a cyclic number.

It is not a de Polignac number, because 6409859 - 2⁸ = 6409603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6409849) 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 3 ways as a sum of consecutive naturals, for example, 168662 + ... + 168699.

It is an arithmetic number, because the mean of its divisors is an integer number (1686810).

Almost surely, 2^6409859 is an apocalyptic number.

6409859 is a deficient number, since it is larger than the sum of its proper divisors (337381).

6409859 is a wasteful number, since it uses less digits than its factorization.

6409859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337380.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 6409859 is about 2531.7699342555. The cubic root of 6409859 is about 185.7588407328.

The spelling of 6409859 in words is "six million, four hundred nine thousand, eight hundred fifty-nine".