25808953 has 4 divisors (see below), whose sum is σ = 25822720. Its totient is φ = 25795188.

The previous prime is 25808947. The next prime is 25808977. The reversal of 25808953 is 35980852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25808953 - 2¹⁷ = 25677881 is a prime.

It is a super-2 number, since 2×25808953² = 1332204109912418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25808903) 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, 3525 + ... + 8002.

It is an arithmetic number, because the mean of its divisors is an integer number (6455680).

Almost surely, 2^25808953 is an apocalyptic number.

It is an amenable number.

25808953 is a deficient number, since it is larger than the sum of its proper divisors (13767).

25808953 is a wasteful number, since it uses less digits than its factorization.

25808953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13766.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 25808953 is about 5080.2512733132. The cubic root of 25808953 is about 295.5222120589.

The spelling of 25808953 in words is "twenty-five million, eight hundred eight thousand, nine hundred fifty-three".