2678779 has 4 divisors (see below), whose sum is σ = 2729376. Its totient is φ = 2628184.

The previous prime is 2678749. The next prime is 2678789. The reversal of 2678779 is 9778762.

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 2678779 - 2⁵ = 2678747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25219 + ... + 25324.

It is an arithmetic number, because the mean of its divisors is an integer number (682344).

2^2678779 is an apocalyptic number.

2678779 is a deficient number, since it is larger than the sum of its proper divisors (50597).

2678779 is an equidigital number, since it uses as much as digits as its factorization.

2678779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50596.

The product of its digits is 296352, while the sum is 46.

The square root of 2678779 is about 1636.6975896604. The cubic root of 2678779 is about 138.8818933602.

The spelling of 2678779 in words is "two million, six hundred seventy-eight thousand, seven hundred seventy-nine".