445445023 has 4 divisors (see below), whose sum is σ = 445663008. Its totient is φ = 445227040.

The previous prime is 445445009. The next prime is 445445081. The reversal of 445445023 is 320544544.

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 445445023 - 2⁹ = 445444511 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445445003) 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, 105898 + ... + 110023.

It is an arithmetic number, because the mean of its divisors is an integer number (111415752).

Almost surely, 2^445445023 is an apocalyptic number.

445445023 is a deficient number, since it is larger than the sum of its proper divisors (217985).

445445023 is a wasteful number, since it uses less digits than its factorization.

445445023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217984.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 445445023 is about 21105.5685306035. The cubic root of 445445023 is about 763.7150874026.

Adding to 445445023 its reverse (320544544), we get a palindrome (765989567).

The spelling of 445445023 in words is "four hundred forty-five million, four hundred forty-five thousand, twenty-three".