6999979 has 8 divisors (see below), whose sum is σ = 8016608. Its totient is φ = 5987520.

The previous prime is 6999973. The next prime is 6999989. The reversal of 6999979 is 9799996.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-6999979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6999973) 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, 4639 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (1002076).

Almost surely, 2^6999979 is an apocalyptic number.

6999979 is a deficient number, since it is larger than the sum of its proper divisors (1016629).

6999979 is a wasteful number, since it uses less digits than its factorization.

6999979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085.

The product of its digits is 2480058, while the sum is 58.

The square root of 6999979 is about 2645.7473424346. The cubic root of 6999979 is about 191.2929269839.

The spelling of 6999979 in words is "six million, nine hundred ninety-nine thousand, nine hundred seventy-nine".