7879 has 2 divisors, whose sum is σ = 7880. Its totient is φ = 7878.

The previous prime is 7877. The next prime is 7883. The reversal of 7879 is 9787.

It is a weak prime.

It is an emirp because it is prime and its reverse (9787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7879 - 2¹ = 7877 is a prime.

Together with 7877, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939 + 3940.

It is an arithmetic number, because the mean of its divisors is an integer number (3940).

2⁷⁸⁷⁹ is an apocalyptic number.

7879 is a deficient number, since it is larger than the sum of its proper divisors (1).

7879 is an equidigital number, since it uses as much as digits as its factorization.

7879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 31.

The square root of 7879 is about 88.7637313321. The cubic root of 7879 is about 19.8986539834.

The spelling of 7879 in words is "seven thousand, eight hundred seventy-nine".