4978788109 has 2 divisors, whose sum is σ = 4978788110. Its totient is φ = 4978788108.

The previous prime is 4978788107. The next prime is 4978788149. The reversal of 4978788109 is 9018878794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3662912484 + 1315875625 = 60522^2 + 36275^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978788109 - 2¹ = 4978788107 is a prime.

Together with 4978788107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4978788107) 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 as a sum of consecutive naturals, namely, 2489394054 + 2489394055.

It is an arithmetic number, because the mean of its divisors is an integer number (2489394055).

Almost surely, 2^4978788109 is an apocalyptic number.

It is an amenable number.

4978788109 is a deficient number, since it is larger than the sum of its proper divisors (1).

4978788109 is an equidigital number, since it uses as much as digits as its factorization.

4978788109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 61.

The square root of 4978788109 is about 70560.5279813013. The cubic root of 4978788109 is about 1707.5543975061.

The spelling of 4978788109 in words is "four billion, nine hundred seventy-eight million, seven hundred eighty-eight thousand, one hundred nine".