4989979 has 2 divisors, whose sum is σ = 4989980. Its totient is φ = 4989978.

The previous prime is 4989973. The next prime is 4989991. The reversal of 4989979 is 9799894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4989979 - 2⁵ = 4989947 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 4⁸ + 9⁴ + 8 + 9⁵ + 9⁵ + 7⁵ + 9⁷ .

4989979 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4989973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494989 + 2494990.

It is an arithmetic number, because the mean of its divisors is an integer number (2494990).

Almost surely, 2^4989979 is an apocalyptic number.

4989979 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989979 is an equidigital number, since it uses as much as digits as its factorization.

4989979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 55.

The square root of 4989979 is about 2233.8260899184. The cubic root of 4989979 is about 170.8832804710.

The spelling of 4989979 in words is "four million, nine hundred eighty-nine thousand, nine hundred seventy-nine".