25538903 has 4 divisors (see below), whose sum is σ = 27503448. Its totient is φ = 23574360.

The previous prime is 25538881. The next prime is 25538923. The reversal of 25538903 is 30983552.

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 25538903 - 2¹⁸ = 25276759 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 (25538923) 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 3 ways as a sum of consecutive naturals, for example, 982253 + ... + 982278.

It is an arithmetic number, because the mean of its divisors is an integer number (6875862).

Almost surely, 2^25538903 is an apocalyptic number.

25538903 is a deficient number, since it is larger than the sum of its proper divisors (1964545).

25538903 is a wasteful number, since it uses less digits than its factorization.

25538903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964544.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 25538903 is about 5053.6029721378. The cubic root of 25538903 is about 294.4878713791.

The spelling of 25538903 in words is "twenty-five million, five hundred thirty-eight thousand, nine hundred three".