2563899 has 16 divisors (see below), whose sum is σ = 3712800. Its totient is φ = 1573728.

The previous prime is 2563877. The next prime is 2563901. The reversal of 2563899 is 9983652.

It is not a de Polignac number, because 2563899 - 2⁵ = 2563867 is a prime.

Its product of digits (116640) is a multiple of the sum of its prime divisors (405).

2563899 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2563899.

It is not an unprimeable number, because it can be changed into a prime (2563819) 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, 6397 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (232050).

2^2563899 is an apocalyptic number.

2563899 is a deficient number, since it is larger than the sum of its proper divisors (1148901).

2563899 is an equidigital number, since it uses as much as digits as its factorization.

2563899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 405 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 2563899 is about 1601.2179739186. The cubic root of 2563899 is about 136.8674904660.

The spelling of 2563899 in words is "two million, five hundred sixty-three thousand, eight hundred ninety-nine".