25668497 has 4 divisors (see below), whose sum is σ = 25977840. Its totient is φ = 25359156.

The previous prime is 25668493. The next prime is 25668499. The reversal of 25668497 is 79486652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25668497 - 2² = 25668493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25668493) 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, 154547 + ... + 154712.

It is an arithmetic number, because the mean of its divisors is an integer number (6494460).

Almost surely, 2^25668497 is an apocalyptic number.

It is an amenable number.

25668497 is a deficient number, since it is larger than the sum of its proper divisors (309343).

25668497 is an equidigital number, since it uses as much as digits as its factorization.

25668497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309342.

The product of its digits is 725760, while the sum is 47.

The square root of 25668497 is about 5066.4086886077. The cubic root of 25668497 is about 294.9851452828.

The spelling of 25668497 in words is "twenty-five million, six hundred sixty-eight thousand, four hundred ninety-seven".