25799 has 2 divisors, whose sum is σ = 25800. Its totient is φ = 25798.

The previous prime is 25793. The next prime is 25801. The reversal of 25799 is 99752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25799 is a prime.

It is a Sophie Germain prime.

Together with 25801, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10 and base 15.

It is a nialpdrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12899 + 12900.

It is an arithmetic number, because the mean of its divisors is an integer number (12900).

2²⁵⁷⁹⁹ is an apocalyptic number.

25799 is a deficient number, since it is larger than the sum of its proper divisors (1).

25799 is an equidigital number, since it uses as much as digits as its factorization.

25799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 32.

The square root of 25799 is about 160.6206711479. The cubic root of 25799 is about 29.5484218644.

The spelling of 25799 in words is "twenty-five thousand, seven hundred ninety-nine".