4639679509 has 2 divisors, whose sum is σ = 4639679510. Its totient is φ = 4639679508.

The previous prime is 4639679507. The next prime is 4639679557. The reversal of 4639679509 is 9059769364.

4639679509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4552200900 + 87478609 = 67470^2 + 9353^2 .

It is a cyclic number.

It is not a de Polignac number, because 4639679509 - 2¹ = 4639679507 is a prime.

Together with 4639679507, 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 (4639679507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319839754 + 2319839755.

It is an arithmetic number, because the mean of its divisors is an integer number (2319839755).

Almost surely, 2^4639679509 is an apocalyptic number.

It is an amenable number.

4639679509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4639679509 is an equidigital number, since it uses as much as digits as its factorization.

4639679509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 58.

The square root of 4639679509 is about 68115.1929381397. The cubic root of 4639679509 is about 1667.8717806013.

The spelling of 4639679509 in words is "four billion, six hundred thirty-nine million, six hundred seventy-nine thousand, five hundred nine".