25879657 has 4 divisors (see below), whose sum is σ = 26430336. Its totient is φ = 25328980.

The previous prime is 25879631. The next prime is 25879663. The reversal of 25879657 is 75697852.

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 a cyclic number.

It is not a de Polignac number, because 25879657 - 2²³ = 17491049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25879657.

It is not an unprimeable number, because it can be changed into a prime (25870657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275269 + ... + 275362.

It is an arithmetic number, because the mean of its divisors is an integer number (6607584).

Almost surely, 2^25879657 is an apocalyptic number.

It is an amenable number.

25879657 is a deficient number, since it is larger than the sum of its proper divisors (550679).

25879657 is an equidigital number, since it uses as much as digits as its factorization.

25879657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550678.

The product of its digits is 1058400, while the sum is 49.

The square root of 25879657 is about 5087.2052248754. The cubic root of 25879657 is about 295.7918284605.

The spelling of 25879657 in words is "twenty-five million, eight hundred seventy-nine thousand, six hundred fifty-seven".