2688613 has 4 divisors (see below), whose sum is σ = 2692908. Its totient is φ = 2684320.

The previous prime is 2688611. The next prime is 2688617. The reversal of 2688613 is 3168862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3168862 = 2 ⋅1584431.

It can be written as a sum of positive squares in 2 ways, for example, as 833569 + 1855044 = 913^2 + 1362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688613 - 2¹ = 2688611 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 (2688611) 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, 1006 + ... + 2527.

It is an arithmetic number, because the mean of its divisors is an integer number (673227).

2^2688613 is an apocalyptic number.

It is an amenable number.

2688613 is a deficient number, since it is larger than the sum of its proper divisors (4295).

2688613 is an equidigital number, since it uses as much as digits as its factorization.

2688613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294.

The product of its digits is 13824, while the sum is 34.

The square root of 2688613 is about 1639.6990577542. The cubic root of 2688613 is about 139.0516344580.

Subtracting 2688613 from its reverse (3168862), we obtain a square (480249 = 693²).

The spelling of 2688613 in words is "two million, six hundred eighty-eight thousand, six hundred thirteen".