25808623 has 2 divisors, whose sum is σ = 25808624. Its totient is φ = 25808622.

The previous prime is 25808621. The next prime is 25808663. The reversal of 25808623 is 32680852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25808623 - 2¹ = 25808621 is a prime.

It is a super-2 number, since 2×25808623² = 1332170042312258, which contains 22 as substring.

Together with 25808621, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25808621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904311 + 12904312.

It is an arithmetic number, because the mean of its divisors is an integer number (12904312).

Almost surely, 2^25808623 is an apocalyptic number.

25808623 is a deficient number, since it is larger than the sum of its proper divisors (1).

25808623 is an equidigital number, since it uses as much as digits as its factorization.

25808623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 25808623 is about 5080.2187945009. The cubic root of 25808623 is about 295.5209525122.

The spelling of 25808623 in words is "twenty-five million, eight hundred eight thousand, six hundred twenty-three".