25679397 has 4 divisors (see below), whose sum is σ = 34239200. Its totient is φ = 17119596.

The previous prime is 25679389. The next prime is 25679441. The reversal of 25679397 is 79397652.

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 25679397 - 2³ = 25679389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25679327) 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, 4279897 + ... + 4279902.

It is an arithmetic number, because the mean of its divisors is an integer number (8559800).

Almost surely, 2^25679397 is an apocalyptic number.

It is an amenable number.

25679397 is a deficient number, since it is larger than the sum of its proper divisors (8559803).

25679397 is an equidigital number, since it uses as much as digits as its factorization.

25679397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559802.

The product of its digits is 714420, while the sum is 48.

The square root of 25679397 is about 5067.4842870995. The cubic root of 25679397 is about 295.0268940338.

The spelling of 25679397 in words is "twenty-five million, six hundred seventy-nine thousand, three hundred ninety-seven".