6820747 has 4 divisors (see below), whose sum is σ = 6844320. Its totient is φ = 6797176.

The previous prime is 6820741. The next prime is 6820769. The reversal of 6820747 is 7470286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6820747 - 2³ = 6820739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820741) 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, 11347 + ... + 11932.

It is an arithmetic number, because the mean of its divisors is an integer number (1711080).

Almost surely, 2^6820747 is an apocalyptic number.

6820747 is a deficient number, since it is larger than the sum of its proper divisors (23573).

6820747 is a wasteful number, since it uses less digits than its factorization.

6820747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23572.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 6820747 is about 2611.6559880658. The cubic root of 6820747 is about 189.6461280319.

The spelling of 6820747 in words is "six million, eight hundred twenty thousand, seven hundred forty-seven".