2563979 has 16 divisors (see below), whose sum is σ = 2955264. Its totient is φ = 2203200.

The previous prime is 2563969. The next prime is 2563997. The reversal of 2563979 is 9793652.

It is a cyclic number.

It is not a de Polignac number, because 2563979 - 2⁸ = 2563723 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 5⁵ + 6⁷ + 3¹¹ + 9 + 7² + 9⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563909) 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 15 ways as a sum of consecutive naturals, for example, 24842 + ... + 24944.

It is an arithmetic number, because the mean of its divisors is an integer number (184704).

2^2563979 is an apocalyptic number.

2563979 is a deficient number, since it is larger than the sum of its proper divisors (391285).

2563979 is a wasteful number, since it uses less digits than its factorization.

2563979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its digits is 102060, while the sum is 41.

The square root of 2563979 is about 1601.2429547074. The cubic root of 2563979 is about 136.8689139861.

The spelling of 2563979 in words is "two million, five hundred sixty-three thousand, nine hundred seventy-nine".