8079921 has 12 divisors (see below), whose sum is σ = 12285520. Its totient is φ = 5103000.

The previous prime is 8079917. The next prime is 8079943. The reversal of 8079921 is 1299708.

It is a happy number.

8079921 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8079921 - 2² = 8079917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8079121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23455 + ... + 23796.

Almost surely, 2^8079921 is an apocalyptic number.

It is an amenable number.

8079921 is a deficient number, since it is larger than the sum of its proper divisors (4205599).

8079921 is a wasteful number, since it uses less digits than its factorization.

8079921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47276 (or 47273 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8079921 is about 2842.5201846249. The cubic root of 8079921 is about 200.6638027256.

The spelling of 8079921 in words is "eight million, seventy-nine thousand, nine hundred twenty-one".