23965 has 4 divisors (see below), whose sum is σ = 28764. Its totient is φ = 19168.

The previous prime is 23957. The next prime is 23971. The reversal of 23965 is 56932.

23965 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15129 + 8836 = 123^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 23965 - 2³ = 23957 is a prime.

It is a Duffinian number.

23965 is strictly pandigital in base 6.

23965 is a lucky number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (7191).

2²³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

23965 is a deficient number, since it is larger than the sum of its proper divisors (4799).

23965 is an equidigital number, since it uses as much as digits as its factorization.

23965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4798.

The product of its digits is 1620, while the sum is 25.

The square root of 23965 is about 154.8063306199. The cubic root of 23965 is about 28.8309627136.

It can be divided in two parts, 2396 and 5, that added together give a 4-th power (2401 = 7⁴).

The spelling of 23965 in words is "twenty-three thousand, nine hundred sixty-five".