25991893 has 8 divisors (see below), whose sum is σ = 26922240. Its totient is φ = 25077360.

The previous prime is 25991879. The next prime is 25991897. The reversal of 25991893 is 39819952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25991893 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 (25991897) 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 7 ways as a sum of consecutive naturals, for example, 558 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (3365280).

Almost surely, 2^25991893 is an apocalyptic number.

It is an amenable number.

25991893 is a deficient number, since it is larger than the sum of its proper divisors (930347).

25991893 is an equidigital number, since it uses as much as digits as its factorization.

25991893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7907.

The product of its digits is 174960, while the sum is 46.

The square root of 25991893 is about 5098.2244948609. The cubic root of 25991893 is about 296.2188126711.

The spelling of 25991893 in words is "twenty-five million, nine hundred ninety-one thousand, eight hundred ninety-three".