445823 has 4 divisors (see below), whose sum is σ = 509520. Its totient is φ = 382128.

The previous prime is 445807. The next prime is 445829. The reversal of 445823 is 328544.

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 445823 - 2⁴ = 445807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445792 and 445801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445829) 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, 31838 + ... + 31851.

It is an arithmetic number, because the mean of its divisors is an integer number (127380).

2⁴⁴⁵⁸²³ is an apocalyptic number.

445823 is a deficient number, since it is larger than the sum of its proper divisors (63697).

445823 is an equidigital number, since it uses as much as digits as its factorization.

445823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63696.

The product of its digits is 3840, while the sum is 26.

The square root of 445823 is about 667.6997828366. The cubic root of 445823 is about 76.3931040074.

The spelling of 445823 in words is "four hundred forty-five thousand, eight hundred twenty-three".