25887863 has 4 divisors (see below), whose sum is σ = 25898328. Its totient is φ = 25877400.

The previous prime is 25887853. The next prime is 25887871. The reversal of 25887863 is 36878852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25887863 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 (25887833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 788 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (6474582).

Almost surely, 2^25887863 is an apocalyptic number.

25887863 is a deficient number, since it is larger than the sum of its proper divisors (10465).

25887863 is an equidigital number, since it uses as much as digits as its factorization.

25887863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10464.

The product of its digits is 645120, while the sum is 47.

The square root of 25887863 is about 5088.0116941690. The cubic root of 25887863 is about 295.8230886796.

The spelling of 25887863 in words is "twenty-five million, eight hundred eighty-seven thousand, eight hundred sixty-three".