6209859 has 4 divisors (see below), whose sum is σ = 8279816. Its totient is φ = 4139904.

The previous prime is 6209837. The next prime is 6209867. The reversal of 6209859 is 9589026.

It is a happy number.

6209859 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6209859 - 2⁸ = 6209603 is a prime.

It is a D-number.

It is a Duffinian number.

6209859 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6229859) 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, 1034974 + ... + 1034979.

It is an arithmetic number, because the mean of its divisors is an integer number (2069954).

Almost surely, 2^6209859 is an apocalyptic number.

6209859 is a deficient number, since it is larger than the sum of its proper divisors (2069957).

6209859 is a wasteful number, since it uses less digits than its factorization.

6209859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069956.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 6209859 is about 2491.9588680394. The cubic root of 6209859 is about 183.8063791086.

The spelling of 6209859 in words is "six million, two hundred nine thousand, eight hundred fifty-nine".