8379021 has 32 divisors (see below), whose sum is σ = 13459456. Its totient is φ = 4536000.

The previous prime is 8379017. The next prime is 8379029. The reversal of 8379021 is 1209738.

It is a happy number.

It is not a de Polignac number, because 8379021 - 2² = 8379017 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8379021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8379029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39606 + ... + 39816.

It is an arithmetic number, because the mean of its divisors is an integer number (420608).

Almost surely, 2^8379021 is an apocalyptic number.

It is an amenable number.

8379021 is a deficient number, since it is larger than the sum of its proper divisors (5080435).

8379021 is a wasteful number, since it uses less digits than its factorization.

8379021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 8379021 is about 2894.6538653179. The cubic root of 8379021 is about 203.1099002898.

The spelling of 8379021 in words is "eight million, three hundred seventy-nine thousand, twenty-one".