6779939 has 8 divisors (see below), whose sum is σ = 7178160. Its totient is φ = 6392736.

The previous prime is 6779921. The next prime is 6779951. The reversal of 6779939 is 9399776.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6779939 - 2⁸ = 6779683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6779999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1472 + ... + 3965.

It is an arithmetic number, because the mean of its divisors is an integer number (897270).

Almost surely, 2^6779939 is an apocalyptic number.

6779939 is a deficient number, since it is larger than the sum of its proper divisors (398221).

6779939 is a wasteful number, since it uses less digits than its factorization.

6779939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509.

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

The square root of 6779939 is about 2603.8315997775. The cubic root of 6779939 is about 189.2671585533.

The spelling of 6779939 in words is "six million, seven hundred seventy-nine thousand, nine hundred thirty-nine".