6719979 has 16 divisors (see below), whose sum is σ = 10685952. Its totient is φ = 3672768.

The previous prime is 6719969. The next prime is 6719983. The reversal of 6719979 is 9799176.

It is not a de Polignac number, because 6719979 - 2¹⁶ = 6654443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6719969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6474 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (667872).

Almost surely, 2^6719979 is an apocalyptic number.

6719979 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

6719979 is a deficient number, since it is larger than the sum of its proper divisors (3965973).

6719979 is a wasteful number, since it uses less digits than its factorization.

6719979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13946.

The product of its digits is 214326, while the sum is 48.

The square root of 6719979 is about 2592.2922288970. The cubic root of 6719979 is about 188.7075626419.

The spelling of 6719979 in words is "six million, seven hundred nineteen thousand, nine hundred seventy-nine".