6379979 has 4 divisors (see below), whose sum is σ = 6386760. Its totient is φ = 6373200.

The previous prime is 6379963. The next prime is 6379999. The reversal of 6379979 is 9799736.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6379979 - 2⁴ = 6379963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6379909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1697 + ... + 3954.

It is an arithmetic number, because the mean of its divisors is an integer number (1596690).

Almost surely, 2^6379979 is an apocalyptic number.

6379979 is a deficient number, since it is larger than the sum of its proper divisors (6781).

6379979 is a wasteful number, since it uses less digits than its factorization.

6379979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780.

The product of its digits is 642978, while the sum is 50.

The square root of 6379979 is about 2525.8620310698. The cubic root of 6379979 is about 185.4697485075.

The spelling of 6379979 in words is "six million, three hundred seventy-nine thousand, nine hundred seventy-nine".