2678813 has 4 divisors (see below), whose sum is σ = 2687100. Its totient is φ = 2670528.

The previous prime is 2678807. The next prime is 2678831. The reversal of 2678813 is 3188762.

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 994009 + 1684804 = 997^2 + 1298^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678813 - 2⁶ = 2678749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678873) 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, 3638 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (671775).

2^2678813 is an apocalyptic number.

It is an amenable number.

2678813 is a deficient number, since it is larger than the sum of its proper divisors (8287).

2678813 is an equidigital number, since it uses as much as digits as its factorization.

2678813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8286.

The product of its digits is 16128, while the sum is 35.

The square root of 2678813 is about 1636.7079763965. The cubic root of 2678813 is about 138.8824809370.

The spelling of 2678813 in words is "two million, six hundred seventy-eight thousand, eight hundred thirteen".