25865913 has 4 divisors (see below), whose sum is σ = 34487888. Its totient is φ = 17243940.

The previous prime is 25865911. The next prime is 25865921. The reversal of 25865913 is 31956852.

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 25865913 - 2¹ = 25865911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25865911) 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, 4310983 + ... + 4310988.

It is an arithmetic number, because the mean of its divisors is an integer number (8621972).

Almost surely, 2^25865913 is an apocalyptic number.

It is an amenable number.

25865913 is a deficient number, since it is larger than the sum of its proper divisors (8621975).

25865913 is an equidigital number, since it uses as much as digits as its factorization.

25865913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621974.

The product of its digits is 64800, while the sum is 39.

The square root of 25865913 is about 5085.8542055391. The cubic root of 25865913 is about 295.7394567879.

The spelling of 25865913 in words is "twenty-five million, eight hundred sixty-five thousand, nine hundred thirteen".