2678705 has 4 divisors (see below), whose sum is σ = 3214452. Its totient is φ = 2142960.

The previous prime is 2678699. The next prime is 2678719. The reversal of 2678705 is 5078762.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 891136 + 1787569 = 944^2 + 1337^2 .

It is not a de Polignac number, because 2678705 - 2¹⁰ = 2677681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 267866 + ... + 267875.

It is an arithmetic number, because the mean of its divisors is an integer number (803613).

2^2678705 is an apocalyptic number.

It is an amenable number.

2678705 is a deficient number, since it is larger than the sum of its proper divisors (535747).

2678705 is an equidigital number, since it uses as much as digits as its factorization.

2678705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535746.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2678705 is about 1636.6749830067. The cubic root of 2678705 is about 138.8806144997.

The spelling of 2678705 in words is "two million, six hundred seventy-eight thousand, seven hundred five".