4779921 has 16 divisors (see below), whose sum is σ = 6656000. Its totient is φ = 3047760.

The previous prime is 4779913. The next prime is 4779949. The reversal of 4779921 is 1299774.

4779921 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4779921 - 2³ = 4779913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4779921.

It is not an unprimeable number, because it can be changed into a prime (4779961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9330 + ... + 9828.

It is an arithmetic number, because the mean of its divisors is an integer number (416000).

Almost surely, 2^4779921 is an apocalyptic number.

It is an amenable number.

4779921 is a deficient number, since it is larger than the sum of its proper divisors (1876079).

4779921 is a wasteful number, since it uses less digits than its factorization.

4779921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636.

The product of its digits is 31752, while the sum is 39.

The square root of 4779921 is about 2186.3030439534. The cubic root of 4779921 is about 168.4509920374.

The spelling of 4779921 in words is "four million, seven hundred seventy-nine thousand, nine hundred twenty-one".