2678563 has 4 divisors (see below), whose sum is σ = 2819560. Its totient is φ = 2537568.

The previous prime is 2678551. The next prime is 2678587. The reversal of 2678563 is 3658762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2678563 - 2¹⁷ = 2547491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678363) 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, 70470 + ... + 70507.

It is an arithmetic number, because the mean of its divisors is an integer number (704890).

2^2678563 is an apocalyptic number.

2678563 is a deficient number, since it is larger than the sum of its proper divisors (140997).

2678563 is a wasteful number, since it uses less digits than its factorization.

2678563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140996.

The product of its digits is 60480, while the sum is 37.

The square root of 2678563 is about 1636.6316017968. The cubic root of 2678563 is about 138.8781604039.

The spelling of 2678563 in words is "two million, six hundred seventy-eight thousand, five hundred sixty-three".