445189 has 4 divisors (see below), whose sum is σ = 468640. Its totient is φ = 421740.

The previous prime is 445187. The next prime is 445199. The reversal of 445189 is 981544.

It is a happy number.

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 not a de Polignac number, because 445189 - 2¹ = 445187 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445183) 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, 11697 + ... + 11734.

It is an arithmetic number, because the mean of its divisors is an integer number (117160).

2⁴⁴⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

445189 is a deficient number, since it is larger than the sum of its proper divisors (23451).

445189 is a wasteful number, since it uses less digits than its factorization.

445189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23450.

The product of its digits is 5760, while the sum is 31.

The square root of 445189 is about 667.2248496571. The cubic root of 445189 is about 76.3568742294.

The spelling of 445189 in words is "four hundred forty-five thousand, one hundred eighty-nine".