8196921 has 12 divisors (see below), whose sum is σ = 11888448. Its totient is φ = 5442264.

The previous prime is 8196919. The next prime is 8196931. The reversal of 8196921 is 1296918.

It is not a de Polignac number, because 8196921 - 2¹ = 8196919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8196911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 636 + ... + 4098.

It is an arithmetic number, because the mean of its divisors is an integer number (990704).

Almost surely, 2^8196921 is an apocalyptic number.

It is an amenable number.

8196921 is a deficient number, since it is larger than the sum of its proper divisors (3691527).

8196921 is a wasteful number, since it uses less digits than its factorization.

8196921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3729 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 8196921 is about 2863.0265454585. The cubic root of 8196921 is about 201.6277249521.

The spelling of 8196921 in words is "eight million, one hundred ninety-six thousand, nine hundred twenty-one".