2509863 has 16 divisors (see below), whose sum is σ = 3667680. Its totient is φ = 1519616.

The previous prime is 2509861. The next prime is 2509891. The reversal of 2509863 is 3689052.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2509863 - 2¹ = 2509861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631 + ... + 2327.

It is an arithmetic number, because the mean of its divisors is an integer number (229230).

2^2509863 is an apocalyptic number.

2509863 is a deficient number, since it is larger than the sum of its proper divisors (1157817).

2509863 is a wasteful number, since it uses less digits than its factorization.

2509863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 2509863 is about 1584.2547143689. The cubic root of 2509863 is about 135.8991286335.

The spelling of 2509863 in words is "two million, five hundred nine thousand, eight hundred sixty-three".