445913 has 4 divisors (see below), whose sum is σ = 480228. Its totient is φ = 411600.

The previous prime is 445891. The next prime is 445931. The reversal of 445913 is 319544.

445913 is nontrivially palindromic in base 15.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51529 + 394384 = 227^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 445913 - 2⁸ = 445657 is a prime.

It is a Duffinian number.

It is a Curzon 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, 17138 + ... + 17163.

It is an arithmetic number, because the mean of its divisors is an integer number (120057).

2⁴⁴⁵⁹¹³ is an apocalyptic number.

It is an amenable number.

445913 is a deficient number, since it is larger than the sum of its proper divisors (34315).

445913 is a wasteful number, since it uses less digits than its factorization.

445913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34314.

The product of its digits is 2160, while the sum is 26.

The square root of 445913 is about 667.7671749944. The cubic root of 445913 is about 76.3982442512.

The spelling of 445913 in words is "four hundred forty-five thousand, nine hundred thirteen".