4778979 has 4 divisors (see below), whose sum is σ = 6371976. Its totient is φ = 3185984.

The previous prime is 4778953. The next prime is 4778981. The reversal of 4778979 is 9798774.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4778979 - 2⁸ = 4778723 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4776979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796494 + ... + 796499.

It is an arithmetic number, because the mean of its divisors is an integer number (1592994).

Almost surely, 2^4778979 is an apocalyptic number.

4778979 is a deficient number, since it is larger than the sum of its proper divisors (1592997).

4778979 is a wasteful number, since it uses less digits than its factorization.

4778979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592996.

The product of its digits is 889056, while the sum is 51.

The square root of 4778979 is about 2186.0876011725. The cubic root of 4778979 is about 168.4399255184.

The spelling of 4778979 in words is "four million, seven hundred seventy-eight thousand, nine hundred seventy-nine".