25897823 has 6 divisors (see below), whose sum is σ = 30126096. Its totient is φ = 22198092.

The previous prime is 25897813. The next prime is 25897829. The reversal of 25897823 is 32879852.

It is not a de Polignac number, because 25897823 - 2²⁰ = 24849247 is a prime.

It is a super-2 number, since 2×25897823² = 1341394472278658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25897829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 264215 + ... + 264312.

It is an arithmetic number, because the mean of its divisors is an integer number (5021016).

Almost surely, 2^25897823 is an apocalyptic number.

25897823 is a deficient number, since it is larger than the sum of its proper divisors (4228273).

25897823 is an equidigital number, since it uses as much as digits as its factorization.

25897823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528541 (or 528534 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 25897823 is about 5088.9903713802. The cubic root of 25897823 is about 295.8610217731.

The spelling of 25897823 in words is "twenty-five million, eight hundred ninety-seven thousand, eight hundred twenty-three".