445423663 has 4 divisors (see below), whose sum is σ = 445471488. Its totient is φ = 445375840.

The previous prime is 445423639. The next prime is 445423697. The reversal of 445423663 is 366324544.

It is a happy number.

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 445423663 - 2²¹ = 443326511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445423633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4906 + ... + 30247.

It is an arithmetic number, because the mean of its divisors is an integer number (111367872).

Almost surely, 2^445423663 is an apocalyptic number.

445423663 is a deficient number, since it is larger than the sum of its proper divisors (47825).

445423663 is a wasteful number, since it uses less digits than its factorization.

445423663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47824.

The product of its digits is 207360, while the sum is 37.

The square root of 445423663 is about 21105.0624969461. The cubic root of 445423663 is about 763.7028799739.

It can be divided in two parts, 44542 and 3663, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 445423663 in words is "four hundred forty-five million, four hundred twenty-three thousand, six hundred sixty-three".