6430979 has 4 divisors (see below), whose sum is σ = 6451584. Its totient is φ = 6410376.

The previous prime is 6430969. The next prime is 6430997. The reversal of 6430979 is 9790346.

6430979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9790346 = 2 ⋅4895173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6430979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6430969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9827 + ... + 10460.

It is an arithmetic number, because the mean of its divisors is an integer number (1612896).

Almost surely, 2^6430979 is an apocalyptic number.

6430979 is a deficient number, since it is larger than the sum of its proper divisors (20605).

6430979 is a wasteful number, since it uses less digits than its factorization.

6430979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20604.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 6430979 is about 2535.9374992298. The cubic root of 6430979 is about 185.9626375025.

The spelling of 6430979 in words is "six million, four hundred thirty thousand, nine hundred seventy-nine".