4979839 has 2 divisors, whose sum is σ = 4979840. Its totient is φ = 4979838.

The previous prime is 4979837. The next prime is 4979879. The reversal of 4979839 is 9389794.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4979839 - 2¹ = 4979837 is a prime.

Together with 4979837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4979792 and 4979801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4979831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489919 + 2489920.

It is an arithmetic number, because the mean of its divisors is an integer number (2489920).

Almost surely, 2^4979839 is an apocalyptic number.

4979839 is a deficient number, since it is larger than the sum of its proper divisors (1).

4979839 is an equidigital number, since it uses as much as digits as its factorization.

4979839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 4979839 is about 2231.5552872380. Note that the first 3 decimals coincide. The cubic root of 4979839 is about 170.7674528970.

The spelling of 4979839 in words is "four million, nine hundred seventy-nine thousand, eight hundred thirty-nine".