6719939 has 4 divisors (see below), whose sum is σ = 7073640. Its totient is φ = 6366240.

The previous prime is 6719917. The next prime is 6719969. The reversal of 6719939 is 9399176.

It is a happy number.

6719939 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6719939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6719939.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176822 + ... + 176859.

It is an arithmetic number, because the mean of its divisors is an integer number (1768410).

Almost surely, 2^6719939 is an apocalyptic number.

6719939 is a deficient number, since it is larger than the sum of its proper divisors (353701).

6719939 is a wasteful number, since it uses less digits than its factorization.

6719939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353700.

The product of its digits is 91854, while the sum is 44.

The square root of 6719939 is about 2592.2845137060. The cubic root of 6719939 is about 188.7071882202.

The spelling of 6719939 in words is "six million, seven hundred nineteen thousand, nine hundred thirty-nine".