6820355 has 4 divisors (see below), whose sum is σ = 8184432. Its totient is φ = 5456280.

The previous prime is 6820339. The next prime is 6820367. The reversal of 6820355 is 5530286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5530286 = 2 ⋅2765143.

It is not a de Polignac number, because 6820355 - 2⁴ = 6820339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682031 + ... + 682040.

It is an arithmetic number, because the mean of its divisors is an integer number (2046108).

Almost surely, 2^6820355 is an apocalyptic number.

6820355 is a deficient number, since it is larger than the sum of its proper divisors (1364077).

6820355 is a wasteful number, since it uses less digits than its factorization.

6820355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364076.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 6820355 is about 2611.5809388185. The cubic root of 6820355 is about 189.6424948665.

It can be divided in two parts, 6820 and 355, that multiplied together give a triangular number (2421100 = T₂₂₀₀).

The spelling of 6820355 in words is "six million, eight hundred twenty thousand, three hundred fifty-five".