445894217 has 4 divisors (see below), whose sum is σ = 455381376. Its totient is φ = 436407060.

The previous prime is 445894213. The next prime is 445894259. The reversal of 445894217 is 712498544.

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 445894217 - 2² = 445894213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445894213) 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, 4743509 + ... + 4743602.

It is an arithmetic number, because the mean of its divisors is an integer number (113845344).

Almost surely, 2^445894217 is an apocalyptic number.

445894217 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

445894217 is a deficient number, since it is larger than the sum of its proper divisors (9487159).

445894217 is an equidigital number, since it uses as much as digits as its factorization.

445894217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487158.

The product of its digits is 322560, while the sum is 44.

The square root of 445894217 is about 21116.2074483085. The cubic root of 445894217 is about 763.9717153943.

The spelling of 445894217 in words is "four hundred forty-five million, eight hundred ninety-four thousand, two hundred seventeen".