6856289 has 4 divisors (see below), whose sum is σ = 7479600. Its totient is φ = 6232980.

The previous prime is 6856279. The next prime is 6856357. The reversal of 6856289 is 9826586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6856289 - 2⁴ = 6856273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6856229) 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, 311639 + ... + 311660.

It is an arithmetic number, because the mean of its divisors is an integer number (1869900).

Almost surely, 2^6856289 is an apocalyptic number.

It is an amenable number.

6856289 is a deficient number, since it is larger than the sum of its proper divisors (623311).

6856289 is a wasteful number, since it uses less digits than its factorization.

6856289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623310.

The product of its digits is 207360, while the sum is 44.

The square root of 6856289 is about 2618.4516417150. The cubic root of 6856289 is about 189.9749643837.

The spelling of 6856289 in words is "six million, eight hundred fifty-six thousand, two hundred eighty-nine".