6820047 has 24 divisors (see below), whose sum is σ = 10771488. Its totient is φ = 4132800.

The previous prime is 6820039. The next prime is 6820057. The reversal of 6820047 is 7400286.

It is not a de Polignac number, because 6820047 - 2³ = 6820039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6820047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7897 + ... + 8717.

It is an arithmetic number, because the mean of its divisors is an integer number (448812).

Almost surely, 2^6820047 is an apocalyptic number.

6820047 is a deficient number, since it is larger than the sum of its proper divisors (3951441).

6820047 is a wasteful number, since it uses less digits than its factorization.

6820047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 6820047 is about 2611.5219700397. The cubic root of 6820047 is about 189.6396401388.

The spelling of 6820047 in words is "six million, eight hundred twenty thousand, forty-seven".