25679971 has 4 divisors (see below), whose sum is σ = 25968600. Its totient is φ = 25391344.

The previous prime is 25679959. The next prime is 25679989. The reversal of 25679971 is 17997652.

It is a happy number.

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

It is not a de Polignac number, because 25679971 - 2¹⁷ = 25548899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25679921) 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, 144181 + ... + 144358.

It is an arithmetic number, because the mean of its divisors is an integer number (6492150).

Almost surely, 2^25679971 is an apocalyptic number.

25679971 is a deficient number, since it is larger than the sum of its proper divisors (288629).

25679971 is an equidigital number, since it uses as much as digits as its factorization.

25679971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288628.

The product of its digits is 238140, while the sum is 46.

The square root of 25679971 is about 5067.5409223804. The cubic root of 25679971 is about 295.0290922185.

The spelling of 25679971 in words is "twenty-five million, six hundred seventy-nine thousand, nine hundred seventy-one".