2578613 has 8 divisors (see below), whose sum is σ = 2670360. Its totient is φ = 2488320.

The previous prime is 2578603. The next prime is 2578621. The reversal of 2578613 is 3168752.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 734449 + 1844164 = 857^2 + 1358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2578613 - 2¹⁸ = 2316469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2578613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4181 + ... + 4757.

It is an arithmetic number, because the mean of its divisors is an integer number (333795).

2^2578613 is an apocalyptic number.

It is an amenable number.

2578613 is a deficient number, since it is larger than the sum of its proper divisors (91747).

2578613 is a wasteful number, since it uses less digits than its factorization.

2578613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its digits is 10080, while the sum is 32.

The square root of 2578613 is about 1605.8060281366. The cubic root of 2578613 is about 137.1288148548.

The spelling of 2578613 in words is "two million, five hundred seventy-eight thousand, six hundred thirteen".