2678723 has 4 divisors (see below), whose sum is σ = 2682048. Its totient is φ = 2675400.

The previous prime is 2678719. The next prime is 2678729. The reversal of 2678723 is 3278762.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3278762 = 2 ⋅1639381.

It is a cyclic number.

It is not a de Polignac number, because 2678723 - 2² = 2678719 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 6⁶ + 7² + 8³ + 7⁴ + 2²¹ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678729) by changing a digit.

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, 398 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (670512).

2^2678723 is an apocalyptic number.

2678723 is a deficient number, since it is larger than the sum of its proper divisors (3325).

2678723 is a wasteful number, since it uses less digits than its factorization.

2678723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324.

The product of its digits is 28224, while the sum is 35.

The square root of 2678723 is about 1636.6804819512. The cubic root of 2678723 is about 138.8809255760.

The spelling of 2678723 in words is "two million, six hundred seventy-eight thousand, seven hundred twenty-three".