2688979 has 2 divisors, whose sum is σ = 2688980. Its totient is φ = 2688978.

The previous prime is 2688977. The next prime is 2688997. The reversal of 2688979 is 9798862.

It is a happy number.

2688979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (2688997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2688979 - 2¹ = 2688977 is a prime.

Together with 2688977, it forms a pair of twin primes.

It is a Chen prime.

2688979 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2688977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344489 + 1344490.

It is an arithmetic number, because the mean of its divisors is an integer number (1344490).

2^2688979 is an apocalyptic number.

2688979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688979 is an equidigital number, since it uses as much as digits as its factorization.

2688979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 2688979 is about 1639.8106598019. The cubic root of 2688979 is about 139.0579438561.

The spelling of 2688979 in words is "two million, six hundred eighty-eight thousand, nine hundred seventy-nine".