2563893 has 14 divisors (see below), whose sum is σ = 3845174. Its totient is φ = 1708776.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563893 is 3983652.

2563893 is a `hidden beast` number, since 2 + 563 + 8 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2537649 + 26244 = 1593^2 + 162^2 .

It is not a de Polignac number, because 2563893 - 2⁴ = 2563877 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 (2563193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1030 + ... + 2487.

2^2563893 is an apocalyptic number.

It is an amenable number.

2563893 is a deficient number, since it is larger than the sum of its proper divisors (1281281).

2563893 is an frugal number, since it uses more digits than its factorization.

2563893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535 (or 3520 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 2563893 is about 1601.2161003437. The cubic root of 2563893 is about 136.8673837008.

The spelling of 2563893 in words is "two million, five hundred sixty-three thousand, eight hundred ninety-three".