6855559 has 4 divisors (see below), whose sum is σ = 6885216. Its totient is φ = 6825904.

The previous prime is 6855529. The next prime is 6855593. The reversal of 6855559 is 9555586.

6855559 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, and also an emirpimes, since its reverse is a distinct semiprime: 9555586 = 2 ⋅4777793.

It is a cyclic number.

It is not a de Polignac number, because 6855559 - 2¹³ = 6847367 is a prime.

It is a Duffinian number.

6855559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14479 + ... + 14944.

It is an arithmetic number, because the mean of its divisors is an integer number (1721304).

Almost surely, 2^6855559 is an apocalyptic number.

6855559 is a deficient number, since it is larger than the sum of its proper divisors (29657).

6855559 is a wasteful number, since it uses less digits than its factorization.

6855559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29656.

The product of its digits is 270000, while the sum is 43.

The square root of 6855559 is about 2618.3122426479. The cubic root of 6855559 is about 189.9682218321.

The spelling of 6855559 in words is "six million, eight hundred fifty-five thousand, five hundred fifty-nine".