8420979 has 16 divisors (see below), whose sum is σ = 12930048. Its totient is φ = 4775232.

The previous prime is 8420977. The next prime is 8420983. The reversal of 8420979 is 9790248.

8420979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8420979 - 2¹ = 8420977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8420977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1414 + ... + 4340.

It is an arithmetic number, because the mean of its divisors is an integer number (808128).

Almost surely, 2^8420979 is an apocalyptic number.

8420979 is a deficient number, since it is larger than the sum of its proper divisors (4509069).

8420979 is a wasteful number, since it uses less digits than its factorization.

8420979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 8420979 is about 2901.8923136464. The cubic root of 8420979 is about 203.4483606676.

The spelling of 8420979 in words is "eight million, four hundred twenty thousand, nine hundred seventy-nine".