25363891 has 4 divisors (see below), whose sum is σ = 28987312. Its totient is φ = 21740472.

The previous prime is 25363889. The next prime is 25363913. The reversal of 25363891 is 19836352.

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 25363891 - 2¹ = 25363889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25363891.

It is not an unprimeable number, because it can be changed into a prime (25363831) 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, 1811700 + ... + 1811713.

It is an arithmetic number, because the mean of its divisors is an integer number (7246828).

Almost surely, 2^25363891 is an apocalyptic number.

25363891 is a deficient number, since it is larger than the sum of its proper divisors (3623421).

25363891 is an equidigital number, since it uses as much as digits as its factorization.

25363891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623420.

The product of its digits is 38880, while the sum is 37.

The square root of 25363891 is about 5036.2576383660. The cubic root of 25363891 is about 293.8136439132.

The spelling of 25363891 in words is "twenty-five million, three hundred sixty-three thousand, eight hundred ninety-one".