25791317 has 4 divisors (see below), whose sum is σ = 25802880. Its totient is φ = 25779756.

The previous prime is 25791307. The next prime is 25791343. The reversal of 25791317 is 71319752.

It is a happy number.

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 25791317 - 2⁴ = 25791301 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 (25791307) 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, 1253 + ... + 7290.

It is an arithmetic number, because the mean of its divisors is an integer number (6450720).

Almost surely, 2^25791317 is an apocalyptic number.

It is an amenable number.

25791317 is a deficient number, since it is larger than the sum of its proper divisors (11563).

25791317 is an equidigital number, since it uses as much as digits as its factorization.

25791317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11562.

The product of its digits is 13230, while the sum is 35.

The square root of 25791317 is about 5078.5152357751. The cubic root of 25791317 is about 295.4548837780.

The spelling of 25791317 in words is "twenty-five million, seven hundred ninety-one thousand, three hundred seventeen".