2708779979 has 4 divisors (see below), whose sum is σ = 2709071376. Its totient is φ = 2708488584.

The previous prime is 2708779963. The next prime is 2708780023. The reversal of 2708779979 is 9799778072.

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 2708779979 - 2⁴ = 2708779963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2708779379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131279 + ... + 150504.

It is an arithmetic number, because the mean of its divisors is an integer number (677267844).

Almost surely, 2^2708779979 is an apocalyptic number.

2708779979 is a deficient number, since it is larger than the sum of its proper divisors (291397).

2708779979 is an equidigital number, since it uses as much as digits as its factorization.

2708779979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291396.

The product of its (nonzero) digits is 28005264, while the sum is 65.

The square root of 2708779979 is about 52045.9410425059. The cubic root of 2708779979 is about 1393.9843892663.

The spelling of 2708779979 in words is "two billion, seven hundred eight million, seven hundred seventy-nine thousand, nine hundred seventy-nine".