25647923 has 6 divisors (see below), whose sum is σ = 29835396. Its totient is φ = 21983892.

The previous prime is 25647901. The next prime is 25647953. The reversal of 25647923 is 32974652.

It is not a de Polignac number, because 25647923 - 2¹⁶ = 25582387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25647953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261665 + ... + 261762.

It is an arithmetic number, because the mean of its divisors is an integer number (4972566).

Almost surely, 2^25647923 is an apocalyptic number.

25647923 is a deficient number, since it is larger than the sum of its proper divisors (4187473).

25647923 is an equidigital number, since it uses as much as digits as its factorization.

25647923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523441 (or 523434 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 25647923 is about 5064.3778492526. The cubic root of 25647923 is about 294.9063113384.

The spelling of 25647923 in words is "twenty-five million, six hundred forty-seven thousand, nine hundred twenty-three".