25985623 has 4 divisors (see below), whose sum is σ = 26145208. Its totient is φ = 25826040.

The previous prime is 25985611. The next prime is 25985651. The reversal of 25985623 is 32658952.

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 25985623 - 2⁹ = 25985111 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 (25985693) 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, 79548 + ... + 79873.

It is an arithmetic number, because the mean of its divisors is an integer number (6536302).

Almost surely, 2^25985623 is an apocalyptic number.

25985623 is a deficient number, since it is larger than the sum of its proper divisors (159585).

25985623 is a wasteful number, since it uses less digits than its factorization.

25985623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159584.

The product of its digits is 129600, while the sum is 40.

The square root of 25985623 is about 5097.6095378128. The cubic root of 25985623 is about 296.1949918934.

The spelling of 25985623 in words is "twenty-five million, nine hundred eighty-five thousand, six hundred twenty-three".