2778563 has 4 divisors (see below), whose sum is σ = 2789088. Its totient is φ = 2768040.

The previous prime is 2778547. The next prime is 2778583. The reversal of 2778563 is 3658772.

It is a happy number.

2778563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2778563 - 2⁴ = 2778547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856 + ... + 5397.

It is an arithmetic number, because the mean of its divisors is an integer number (697272).

2^2778563 is an apocalyptic number.

2778563 is a deficient number, since it is larger than the sum of its proper divisors (10525).

2778563 is a wasteful number, since it uses less digits than its factorization.

2778563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524.

The product of its digits is 70560, while the sum is 38.

The square root of 2778563 is about 1666.9022166882. The cubic root of 2778563 is about 140.5853552772.

The spelling of 2778563 in words is "two million, seven hundred seventy-eight thousand, five hundred sixty-three".