25719823 has 2 divisors, whose sum is σ = 25719824. Its totient is φ = 25719822.

The previous prime is 25719809. The next prime is 25719829. The reversal of 25719823 is 32891752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25719823 - 2²¹ = 23622671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25719829) 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, 12859911 + 12859912.

It is an arithmetic number, because the mean of its divisors is an integer number (12859912).

Almost surely, 2^25719823 is an apocalyptic number.

25719823 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719823 is an equidigital number, since it uses as much as digits as its factorization.

25719823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 25719823 is about 5071.4714827158. The cubic root of 25719823 is about 295.1816290286.

The spelling of 25719823 in words is "twenty-five million, seven hundred nineteen thousand, eight hundred twenty-three".