6921996 has 24 divisors (see below), whose sum is σ = 16194864. Its totient is φ = 2301120.

The previous prime is 6921961. The next prime is 6922001. The reversal of 6921996 is 6991296.

It is a happy number.

6921996 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6886 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (674786).

Almost surely, 2^6921996 is an apocalyptic number.

It is an amenable number.

6921996 is an abundant number, since it is smaller than the sum of its proper divisors (9272868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6921996 is a wasteful number, since it uses less digits than its factorization.

6921996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its digits is 52488, while the sum is 42.

The square root of 6921996 is about 2630.9686429146. The cubic root of 6921996 is about 190.5799087471.

The spelling of 6921996 in words is "six million, nine hundred twenty-one thousand, nine hundred ninety-six".