445993 has 4 divisors (see below), whose sum is σ = 465408. Its totient is φ = 426580.

The previous prime is 445969. The next prime is 446003. The reversal of 445993 is 399544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445993 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445943) 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, 9673 + ... + 9718.

It is an arithmetic number, because the mean of its divisors is an integer number (116352).

2⁴⁴⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

445993 is a deficient number, since it is larger than the sum of its proper divisors (19415).

445993 is a wasteful number, since it uses less digits than its factorization.

445993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19414.

The product of its digits is 19440, while the sum is 34.

The square root of 445993 is about 667.8270734254. The cubic root of 445993 is about 76.4028127762.

The spelling of 445993 in words is "four hundred forty-five thousand, nine hundred ninety-three".