6820043 has 4 divisors (see below), whose sum is σ = 7221240. Its totient is φ = 6418848.

The previous prime is 6820039. The next prime is 6820057. The reversal of 6820043 is 3400286.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400286 = 2 ⋅1700143.

It is a cyclic number.

It is not a de Polignac number, because 6820043 - 2² = 6820039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820013) 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, 200573 + ... + 200606.

It is an arithmetic number, because the mean of its divisors is an integer number (1805310).

Almost surely, 2^6820043 is an apocalyptic number.

6820043 is a deficient number, since it is larger than the sum of its proper divisors (401197).

6820043 is a wasteful number, since it uses less digits than its factorization.

6820043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401196.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6820043 is about 2611.5212042026. The cubic root of 6820043 is about 189.6396030639.

The spelling of 6820043 in words is "six million, eight hundred twenty thousand, forty-three".