25740823 has 2 divisors, whose sum is σ = 25740824. Its totient is φ = 25740822.

The previous prime is 25740821. The next prime is 25740851. The reversal of 25740823 is 32804752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25740823 - 2¹ = 25740821 is a prime.

It is a super-3 number, since 3×25740823³ (a number of 23 digits) contains 333 as substring.

Together with 25740821, 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 (25740821) 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 as a sum of consecutive naturals, namely, 12870411 + 12870412.

It is an arithmetic number, because the mean of its divisors is an integer number (12870412).

Almost surely, 2^25740823 is an apocalyptic number.

25740823 is a deficient number, since it is larger than the sum of its proper divisors (1).

25740823 is an equidigital number, since it uses as much as digits as its factorization.

25740823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 25740823 is about 5073.5414652883. The cubic root of 25740823 is about 295.2619448727.

The spelling of 25740823 in words is "twenty-five million, seven hundred forty thousand, eight hundred twenty-three".