39823 has 4 divisors (see below), whose sum is σ = 45520. Its totient is φ = 34128.

The previous prime is 39821. The next prime is 39827. The reversal of 39823 is 32893.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 39823 - 2¹ = 39821 is a prime.

It is a d-powerful number, because it can be written as 3⁵ + 9⁴ + 8 + 2¹⁵ + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39821) 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, 2838 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (11380).

2³⁹⁸²³ is an apocalyptic number.

39823 is a deficient number, since it is larger than the sum of its proper divisors (5697).

39823 is an equidigital number, since it uses as much as digits as its factorization.

39823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5696.

The product of its digits is 1296, while the sum is 25.

The square root of 39823 is about 199.5570093983. The cubic root of 39823 is about 34.1490000543.

The spelling of 39823 in words is "thirty-nine thousand, eight hundred twenty-three".