25723 has 4 divisors (see below), whose sum is σ = 26640. Its totient is φ = 24808.

The previous prime is 25717. The next prime is 25733. The reversal of 25723 is 32752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25723 is a prime.

It is a d-powerful number, because it can be written as 2 + 5⁵ + 7⁴ + 2⁹ + 3⁹ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25723.

It is not an unprimeable number, because it can be changed into a prime (25703) 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, 415 + ... + 472.

It is an arithmetic number, because the mean of its divisors is an integer number (6660).

2²⁵⁷²³ is an apocalyptic number.

25723 is a deficient number, since it is larger than the sum of its proper divisors (917).

25723 is an equidigital number, since it uses as much as digits as its factorization.

25723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its digits is 420, while the sum is 19.

The square root of 25723 is about 160.3839144054. The cubic root of 25723 is about 29.5193782474.

The spelling of 25723 in words is "twenty-five thousand, seven hundred twenty-three".