6820691 has 8 divisors (see below), whose sum is σ = 7092624. Its totient is φ = 6553440.

The previous prime is 6820663. The next prime is 6820711. The reversal of 6820691 is 1960286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6820691 - 2¹⁰ = 6819667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1961 + ... + 4181.

It is an arithmetic number, because the mean of its divisors is an integer number (886578).

Almost surely, 2^6820691 is an apocalyptic number.

6820691 is a deficient number, since it is larger than the sum of its proper divisors (271933).

6820691 is a wasteful number, since it uses less digits than its factorization.

6820691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 6820691 is about 2611.6452668768. The cubic root of 6820691 is about 189.6456090168.

The spelling of 6820691 in words is "six million, eight hundred twenty thousand, six hundred ninety-one".