25490823 has 4 divisors (see below), whose sum is σ = 33987768. Its totient is φ = 16993880.

The previous prime is 25490821. The next prime is 25490833. The reversal of 25490823 is 32809452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25490823 - 2¹ = 25490821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25490821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4248468 + ... + 4248473.

It is an arithmetic number, because the mean of its divisors is an integer number (8496942).

Almost surely, 2^25490823 is an apocalyptic number.

25490823 is a deficient number, since it is larger than the sum of its proper divisors (8496945).

25490823 is an equidigital number, since it uses as much as digits as its factorization.

25490823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496944.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 25490823 is about 5048.8437290136. The cubic root of 25490823 is about 294.3029525584.

The spelling of 25490823 in words is "twenty-five million, four hundred ninety thousand, eight hundred twenty-three".