25779 has 8 divisors (see below), whose sum is σ = 37072. Its totient is φ = 15840.

The previous prime is 25771. The next prime is 25793. The reversal of 25779 is 97752.

It is a happy number.

25779 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25779 - 2³ = 25771 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (25771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292 + ... + 369.

It is an arithmetic number, because the mean of its divisors is an integer number (4634).

2²⁵⁷⁷⁹ is an apocalyptic number.

25779 is a deficient number, since it is larger than the sum of its proper divisors (11293).

25779 is a wasteful number, since it uses less digits than its factorization.

25779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677.

The product of its digits is 4410, while the sum is 30.

The square root of 25779 is about 160.5584005899. The cubic root of 25779 is about 29.5407843434.

The spelling of 25779 in words is "twenty-five thousand, seven hundred seventy-nine".