6980821 has 8 divisors (see below), whose sum is σ = 7149600. Its totient is φ = 6813840.

The previous prime is 6980777. The next prime is 6980833. The reversal of 6980821 is 1280896.

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

It is a cyclic number.

It is not a de Polignac number, because 6980821 - 2¹³ = 6972629 is a prime.

It is a Duffinian number.

6980821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6980021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10231 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (893700).

Almost surely, 2^6980821 is an apocalyptic number.

It is an amenable number.

6980821 is a deficient number, since it is larger than the sum of its proper divisors (168779).

6980821 is a wasteful number, since it uses less digits than its factorization.

6980821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 6980821 is about 2642.1243346974. The cubic root of 6980821 is about 191.1182532059.

The spelling of 6980821 in words is "six million, nine hundred eighty thousand, eight hundred twenty-one".