6820997 has 4 divisors (see below), whose sum is σ = 6853536. Its totient is φ = 6788460.

The previous prime is 6820993. The next prime is 6820999. The reversal of 6820997 is 7990286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6820997 - 2² = 6820993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820991) 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, 15953 + ... + 16374.

It is an arithmetic number, because the mean of its divisors is an integer number (1713384).

Almost surely, 2^6820997 is an apocalyptic number.

It is an amenable number.

6820997 is a deficient number, since it is larger than the sum of its proper divisors (32539).

6820997 is a wasteful number, since it uses less digits than its factorization.

6820997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32538.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 6820997 is about 2611.7038499799. The cubic root of 6820997 is about 189.6484450290.

The spelling of 6820997 in words is "six million, eight hundred twenty thousand, nine hundred ninety-seven".