25881697 has 4 divisors (see below), whose sum is σ = 25894080. Its totient is φ = 25869316.

The previous prime is 25881679. The next prime is 25881703. The reversal of 25881697 is 79618852.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25881697 - 2¹⁵ = 25848929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25881617) 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, 2197 + ... + 7522.

It is an arithmetic number, because the mean of its divisors is an integer number (6473520).

Almost surely, 2^25881697 is an apocalyptic number.

It is an amenable number.

25881697 is a deficient number, since it is larger than the sum of its proper divisors (12383).

25881697 is an equidigital number, since it uses as much as digits as its factorization.

25881697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382.

The product of its digits is 241920, while the sum is 46.

The square root of 25881697 is about 5087.4057239422. The cubic root of 25881697 is about 295.7996003239.

The spelling of 25881697 in words is "twenty-five million, eight hundred eighty-one thousand, six hundred ninety-seven".