7983979 has 2 divisors, whose sum is σ = 7983980. Its totient is φ = 7983978.

The previous prime is 7983959. The next prime is 7984001. The reversal of 7983979 is 9793897.

It is a weak prime.

It is an emirp because it is prime and its reverse (9793897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7983979 - 2⁵ = 7983947 is a prime.

It is not a weakly prime, because it can be changed into another prime (7983919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3991989 + 3991990.

It is an arithmetic number, because the mean of its divisors is an integer number (3991990).

Almost surely, 2^7983979 is an apocalyptic number.

7983979 is a deficient number, since it is larger than the sum of its proper divisors (1).

7983979 is an equidigital number, since it uses as much as digits as its factorization.

7983979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 52.

The square root of 7983979 is about 2825.5935659610. The cubic root of 7983979 is about 199.8664024450.

The spelling of 7983979 in words is "seven million, nine hundred eighty-three thousand, nine hundred seventy-nine".