4978309 has 4 divisors (see below), whose sum is σ = 5689504. Its totient is φ = 4267116.

The previous prime is 4978291. The next prime is 4978349. The reversal of 4978309 is 9038794.

4978309 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4978309 - 2⁵ = 4978277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978349) 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, 355587 + ... + 355600.

It is an arithmetic number, because the mean of its divisors is an integer number (1422376).

Almost surely, 2^4978309 is an apocalyptic number.

It is an amenable number.

4978309 is a deficient number, since it is larger than the sum of its proper divisors (711195).

4978309 is an equidigital number, since it uses as much as digits as its factorization.

4978309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711194.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 4978309 is about 2231.2124506644. The cubic root of 4978309 is about 170.7499623071.

The spelling of 4978309 in words is "four million, nine hundred seventy-eight thousand, three hundred nine".