25805923 has 16 divisors (see below), whose sum is σ = 30604896. Its totient is φ = 21450240.

The previous prime is 25805869. The next prime is 25805947. The reversal of 25805923 is 32950852.

It is a cyclic number.

It is not a de Polignac number, because 25805923 - 2⁹ = 25805411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25805963) 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 15 ways as a sum of consecutive naturals, for example, 15361 + ... + 16957.

It is an arithmetic number, because the mean of its divisors is an integer number (1912806).

Almost surely, 2^25805923 is an apocalyptic number.

25805923 is a deficient number, since it is larger than the sum of its proper divisors (4798973).

25805923 is a wasteful number, since it uses less digits than its factorization.

25805923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 25805923 is about 5079.9530509642. The cubic root of 25805923 is about 295.5106467267.

Subtracting 25805923 from its reverse (32950852), we obtain a square (7144929 = 2673²).

The spelling of 25805923 in words is "twenty-five million, eight hundred five thousand, nine hundred twenty-three".