445999 has 4 divisors (see below), whose sum is σ = 447336. Its totient is φ = 444664.

The previous prime is 445969. The next prime is 446003. The reversal of 445999 is 999544.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 445999 - 2⁵ = 445967 is a prime.

It is a Duffinian number.

445999 is a modest number, since divided by 999 gives 445 as remainder.

445999 is a lucky number.

It is a plaindrome in base 10.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445969) 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, 312 + ... + 994.

It is an arithmetic number, because the mean of its divisors is an integer number (111834).

2⁴⁴⁵⁹⁹⁹ is an apocalyptic number.

445999 is a deficient number, since it is larger than the sum of its proper divisors (1337).

445999 is an equidigital number, since it uses as much as digits as its factorization.

445999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its digits is 58320, while the sum is 40.

The square root of 445999 is about 667.8315655912. The cubic root of 445999 is about 76.4031553936.

It can be divided in two parts, 445 and 999, that added together give a square (1444 = 38²).

The spelling of 445999 in words is "four hundred forty-five thousand, nine hundred ninety-nine".