445478791 has 4 divisors (see below), whose sum is σ = 452781784. Its totient is φ = 438175800.

The previous prime is 445478741. The next prime is 445478819. The reversal of 445478791 is 197874544.

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 445478791 - 2¹⁷ = 445347719 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 (445478741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651405 + ... + 3651526.

It is an arithmetic number, because the mean of its divisors is an integer number (113195446).

Almost surely, 2^445478791 is an apocalyptic number.

445478791 is a deficient number, since it is larger than the sum of its proper divisors (7302993).

445478791 is an equidigital number, since it uses as much as digits as its factorization.

445478791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302992.

The product of its digits is 1128960, while the sum is 49.

The square root of 445478791 is about 21106.3684938930. The cubic root of 445478791 is about 763.7343853167.

The spelling of 445478791 in words is "four hundred forty-five million, four hundred seventy-eight thousand, seven hundred ninety-one".