2678999 has 4 divisors (see below), whose sum is σ = 2682600. Its totient is φ = 2675400.

The previous prime is 2678993. The next prime is 2679031. The reversal of 2678999 is 9998762.

2678999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 2678999 - 2⁴ = 2678983 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678993) 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 in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 2325.

It is an arithmetic number, because the mean of its divisors is an integer number (670650).

2^2678999 is an apocalyptic number.

2678999 is a deficient number, since it is larger than the sum of its proper divisors (3601).

2678999 is a wasteful number, since it uses less digits than its factorization.

2678999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600.

The product of its digits is 489888, while the sum is 50.

The square root of 2678999 is about 1636.7647967866. The cubic root of 2678999 is about 138.8856952392.

The spelling of 2678999 in words is "two million, six hundred seventy-eight thousand, nine hundred ninety-nine".