25641823 has 2 divisors, whose sum is σ = 25641824. Its totient is φ = 25641822.

The previous prime is 25641821. The next prime is 25641839. The reversal of 25641823 is 32814652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25641823 - 2¹ = 25641821 is a prime.

It is a super-3 number, since 3×25641823³ (a number of 23 digits) contains 333 as substring.

Together with 25641821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25641821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12820911 + 12820912.

It is an arithmetic number, because the mean of its divisors is an integer number (12820912).

Almost surely, 2^25641823 is an apocalyptic number.

25641823 is a deficient number, since it is larger than the sum of its proper divisors (1).

25641823 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 25641823 = (53221864)₉.

25641823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 25641823 is about 5063.7755676965. The cubic root of 25641823 is about 294.8829297033.

The spelling of 25641823 in words is "twenty-five million, six hundred forty-one thousand, eight hundred twenty-three".