23945 has 4 divisors (see below), whose sum is σ = 28740. Its totient is φ = 19152.

The previous prime is 23929. The next prime is 23957. The reversal of 23945 is 54932.

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 4624 + 19321 = 68^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 23945 - 2⁴ = 23929 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 3⁹ + 9 + 4⁶ + 5³ .

It is a self number, because there is not a number n which added to its sum of digits gives 23945.

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, 2390 + ... + 2399.

It is an arithmetic number, because the mean of its divisors is an integer number (7185).

2²³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

23945 is a deficient number, since it is larger than the sum of its proper divisors (4795).

23945 is an equidigital number, since it uses as much as digits as its factorization.

23945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794.

The product of its digits is 1080, while the sum is 23.

The square root of 23945 is about 154.7417202955. The cubic root of 23945 is about 28.8229401844.

The spelling of 23945 in words is "twenty-three thousand, nine hundred forty-five".